Inter-phase heat exchange coefficient prediction method and device based on bubble form change
By obtaining the physical parameters of the bubbles, determining the Weber number and Morton number, and using the aspect ratio prediction model and the phase heat transfer coefficient correction factor, the problem of prediction error of phase heat transfer coefficient caused by bubble morphology changes was solved, and the accurate prediction of the heat transfer capacity of deformed bubbles was realized, thus improving the accuracy of nuclear reactor thermal-hydraulic analysis.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-17
- Publication Date
- 2026-03-24
AI Technical Summary
In existing technologies, the morphological changes of bubbles in pressurized water nuclear reactors are not fully considered, resulting in large errors in the prediction of interphase heat transfer coefficients and affecting the accuracy of thermal-hydraulic analysis.
By obtaining the physical parameters of the bubbles, determining the Weber number and Morton number, and using the aspect ratio prediction model, combined with the aspect ratio and interphase heat transfer coefficient correction factor obtained by fitting the visualized experimental data, a quantitative relationship between bubble morphology changes and heat transfer capacity is established.
It enables accurate prediction of the heat transfer capacity of deformable bubbles, improving the accuracy of nuclear reactor thermal-hydraulic analysis.
Smart Images
Figure CN121723916A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of nuclear reactor thermal-hydraulic technology, and in particular to a method and apparatus for predicting interphase heat transfer coefficients based on changes in bubble morphology. Background Technology
[0002] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section.
[0003] In the operation of pressurized water nuclear reactors, two-phase flow and heat transfer processes involving vapor and liquid are common. The system analysis program uses a two-fluid model for safety analysis, where the interphase heat transfer coefficient is a key model parameter that directly affects the calculation accuracy of the system's cavitation fraction, temperature field, and pressure field.
[0004] Traditional interphase heat transfer models typically simplify bubbles to spherical shapes. However, in actual flows, during buoyancy, growth, or condensation, bubbles are subjected to inertial forces, surface tension, and viscous forces, causing their shapes to evolve from spherical to ellipsoidal or even cap-shaped. This morphological change significantly alters the flow field structure and thermal boundary layer state around the bubble, thus affecting the intensity of interphase heat transfer. Most existing models neglect the influence of bubble deformation or implicitly incorporate deformation effects into empirical correlations, leading to large prediction errors under conditions of significant bubble deformation and thus lower accuracy in nuclear reactor thermal-hydraulic analysis. Summary of the Invention
[0005] This invention provides a method for predicting interphase heat transfer coefficient based on bubble morphology changes, to solve at least some of the problems in the prior art. The method includes: Obtain the physical parameters of the bubbles under the target working condition, wherein the physical parameters include at least the liquid phase density, liquid phase kinematic viscosity, bubble diameter, surface tension, vapor phase density, gravitational acceleration, liquid phase dynamic viscosity, bubble velocity, vapor phase temperature, liquid phase temperature, liquid phase specific heat capacity, latent heat of vaporization, and liquid phase thermal diffusivity. Based on the physical parameters, determine the Weber number and Morton number of the bubble; The Weber number and the Morton number are input into a preset aspect ratio prediction model to obtain the aspect ratio of the bubble, wherein the aspect ratio prediction model is: , Aspect ratio, For Weber numbers, The Morton number is used, and the constants U1, U2, and U3 are obtained by fitting visual experimental data of the steam-water two-phase system. Based on the physical parameters and the aspect ratio, the interphase heat transfer coefficient of the bubbles is obtained.
[0006] Advantageously, the Weber number and Morton number of the bubble are determined based on the physical parameters, including: According to the formula Determine the Weber number of the bubble, where, This refers to the inertial force during the movement of air bubbles. The surface tension during the bubble movement process. The density of the liquid phase is... The viscosity is the kinematic viscosity of the liquid phase. The diameter of the bubble is _____. Surface tension; According to the formula Determine the Morton number of the bubble, where, The viscous force of the bubbles. Let g be the buoyancy force of the bubble, and g be the acceleration due to gravity. Where is the density of the vapor phase. This is the dynamic viscosity of the liquid phase.
[0007] Advantageously, the aspect ratio prediction model is as follows: .
[0008] Advantageously, the interphase heat transfer coefficient of the bubbles is obtained based on the physical parameters and the aspect ratio, including: When the aspect ratio is below a preset threshold, Determine the interphase heat transfer coefficient of the bubbles; When the aspect ratio is greater than a preset threshold, Determine the interphase heat transfer coefficient of the bubbles, wherein, For the bubble Reynolds number, For Jacob's number, The Prandtl number, the bubble Reynolds number, the Jacobian number, and the Prandtl number are obtained through the physical parameters. To the aspect ratio of the bubbles Related interphase heat transfer coefficient correction factor, interphase heat transfer coefficient correction factor The constants C, n, m, and r were obtained by fitting the visualized experimental data of the steam-water two-phase system.
[0009] Advantageously, the interphase heat transfer coefficient of the bubbles is obtained based on the physical parameters and the aspect ratio, including: by Determine the interphase heat transfer coefficient of the bubbles, wherein, For the bubble Reynolds number, For Jacob's number, The Prandtl number, the bubble Reynolds number, the Jacobian number, and the Prandtl number are obtained through the physical parameters. To the aspect ratio of the bubbles Related interphase heat transfer coefficient correction factor, interphase heat transfer coefficient correction factor The constants C, n, m, and r were obtained by fitting the visualized experimental data of the steam-water two-phase system.
[0010] Advantageously, the interphase heat transfer coefficient correction factor This is the average value of the correction factor for the interphase heat transfer coefficient of multiple bubbles within a bubble deformation range; and / or The interphase heat transfer coefficient correction factor ; and / or .
[0011] This invention also provides a device for predicting interphase heat transfer coefficient based on bubble morphology changes, to solve at least some of the problems in the prior art. The device includes: The parameter acquisition module is used to acquire the physical parameters of the bubbles under the target working conditions. The physical parameters include at least the liquid phase density, liquid phase kinematic viscosity, bubble diameter, surface tension, liquid phase density, vapor phase density, gravitational acceleration, liquid phase dynamic viscosity, bubble velocity, vapor phase temperature, liquid phase temperature, liquid phase heat capacity, latent heat of vaporization, and liquid phase thermal diffusivity. The parameter determination module is used to determine the Weber number and Morton number of the bubble based on the physical parameters. The aspect ratio acquisition module is used to input the Weber number and the Morton number into a preset aspect ratio prediction model to obtain the aspect ratio of the bubble, wherein the aspect ratio prediction model is... , Aspect ratio, For Weber numbers, The Morton number is used, and the constants U1, U2, and U3 are obtained by fitting visual experimental data of the steam-water two-phase system. The coefficient acquisition module is used to obtain the interphase heat transfer coefficient of the bubbles based on the physical parameters and the aspect ratio.
[0012] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described method for predicting the interphase heat transfer coefficient.
[0013] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for predicting interphase heat transfer coefficients.
[0014] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described method for predicting the interphase heat transfer coefficient.
[0015] According to an embodiment of the present invention, by acquiring the physical parameters of a bubble under a target operating condition, wherein the physical parameters include at least liquid phase density, liquid phase kinematic viscosity, bubble diameter, surface tension, vapor phase density, gravitational acceleration, liquid phase dynamic viscosity, bubble velocity, vapor phase temperature, liquid phase temperature, liquid phase specific heat capacity, latent heat of vaporization, and liquid phase thermal diffusivity; based on the physical parameters, the Weber number and Morton number of the bubble are determined; the Weber number and the Morton number are input into a preset aspect ratio prediction model to obtain the aspect ratio of the bubble, wherein the aspect ratio prediction model is... , Aspect ratio, For Weber numbers, The Morton number, constants U1, U2, and U3 are obtained by fitting visualized experimental data of the steam-water two-phase system. Based on the physical parameters and the aspect ratio, the interphase heat transfer coefficient of the bubble is obtained. By establishing the relationship between the bubble aspect ratio and key dimensionless numbers (Weber number, Morton number), the heat transfer capacity of the deformed bubble is quantitatively evaluated and accurately predicted. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic flowchart illustrating an example of a method for predicting interphase heat transfer coefficient based on bubble morphology changes according to an embodiment of the present invention. Figure 2 This is a schematic diagram showing the equivalent radius, major axis, and minor axis of an elliptical bubble according to an embodiment of the present invention; Figure 3 This is a schematic structural diagram of an example of a device for predicting the interphase heat transfer coefficient based on changes in bubble morphology according to an embodiment of the present invention. Figure 4 This is a schematic structural diagram of an example of a computer device according to an embodiment of the present invention. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.
[0018] Figure 1 This is a schematic flowchart illustrating an example of a method for predicting interphase heat transfer coefficients based on changes in bubble morphology according to an embodiment of the present invention. Figure 1 As shown, the method for predicting interphase heat transfer coefficient based on bubble morphology changes according to an embodiment of the present invention includes: Step 10: Obtain the physical parameters of the bubbles under the target working condition. The physical parameters include at least the liquid phase density, liquid phase kinematic viscosity, bubble diameter, surface tension, vapor phase density, gravitational acceleration, liquid phase dynamic viscosity, bubble velocity, vapor phase temperature, liquid phase temperature, liquid phase specific heat capacity, latent heat of vaporization, and liquid phase thermal diffusivity. Step 20: Determine the Weber number and Morton number of the bubble based on the physical parameters; Step 30: Input the Weber number and the Morton number into a preset aspect ratio prediction model to obtain the aspect ratio of the bubble, wherein the aspect ratio prediction model is... , Aspect ratio, For Weber numbers, The Morton number is used, and the constants U1, U2, and U3 are obtained by fitting visual experimental data of the steam-water two-phase system. Step 40: Based on the physical parameters and the aspect ratio, obtain the interphase heat transfer coefficient of the bubbles.
[0019] According to an embodiment of the present invention, by establishing an explicit relationship between the aspect ratio of bubbles and the Weber number and Morton number in a steam-water two-phase system, the deformation and stress state of bubbles are mechanistically linked, which helps to achieve quantitative assessment and accurate prediction of the heat transfer capacity of deformed bubbles.
[0020] During bubble growth, as the radius and relative velocity increase, the bubble gradually transforms from a spherical shape to an elliptical shape. Due to this change in bubble shape, the effect of convective heat transfer on the heat transfer coefficient differs from that of spherical bubbles. Figure 2 This is a schematic diagram showing the equivalent radius, major axis, and minor axis of an elliptical bubble according to an embodiment of the present invention. Figure 2 As shown, it illustrates the relationship between the equivalent radius R, major axis c, and minor axis b after bubble deformation. The ratio between the major axis c and the minor axis b is called the aspect ratio. Therefore, aspect ratio It is a value greater than 1.
[0021] Advantageously, step 20, determining the Weber number and Morton number of the bubble based on the physical parameters, may include: According to the formula Determine the Weber number of the bubble, where, This refers to the inertial force during the movement of air bubbles. The surface tension during the bubble movement process. The density of the liquid phase is... The viscosity is the kinematic viscosity of the liquid phase. The diameter of the bubble is _____. Surface tension; According to the formula Determine the Morton number of the bubble, where, The viscous force of the bubbles. Let g be the buoyancy force of the bubble, and g be the acceleration due to gravity. Where is the density of the vapor phase. This is the dynamic viscosity of the liquid phase.
[0022] The Weber number is physically the ratio of inertial force to surface tension during bubble motion. It is related to both the bubble diameter and its velocity. The Morton number, often used in conjunction with the Eutwash number, characterizes the shape and rise velocity of bubbles or droplets moving in a fluid or continuous phase. Essentially, it represents the importance of viscous forces relative to the combined effects of buoyancy and surface tension. The Morton number is a fluid property number, meaning it remains constant for a given fluid system at specific temperatures and pressures, independent of bubble size. This makes it useful for classifying different fluid systems and their expected bubble behavior.
[0023] Optionally, in step 30, the aspect ratio prediction model can be: .
[0024] The predicted data from the above aspect ratio prediction model have an error of less than ±20% compared with most of the experimental data, indicating a good fit. This shows that the aspect ratio prediction model, which selects the Weber number and Morton number as variables, can correctly describe the bubble deformation process.
[0025] Advantageously, step 40, obtaining the interphase heat transfer coefficient of the bubbles based on the physical parameters and the aspect ratio, may include: When the aspect ratio is below a preset threshold, Determine the interphase heat transfer coefficient of the bubbles; When the aspect ratio is greater than a preset threshold, Determine the interphase heat transfer coefficient of the bubbles, wherein, For the bubble Reynolds number, For Jacob's number, The Prandtl number, the bubble Reynolds number, the Jacobian number, and the Prandtl number are obtained through the physical parameters. To the aspect ratio of the bubbles Related interphase heat transfer coefficient correction factor, interphase heat transfer coefficient correction factor The constants C, n, m, and r were obtained by fitting the visualized experimental data of the steam-water two-phase system.
[0026] For example, based on the bubble shape, we first obtain 1< For the interphase heat transfer coefficient of near-spherical bubbles <1.1, suitable parameters C, n, m, and r can be fitted after statistical averaging, thus obtaining the interphase heat transfer coefficient expressing the spherical bubble. The relationship was obtained by fitting the experimental data. In the formula, the Reynolds number, Jacobi number, and Prandtl number represent the values of the bubble when the deformation is less than 1. The average value during the process is <1.1. Under this deformation, the bubbles basically maintain a spherical shape, and the fitting result of the interphase heat transfer coefficient is good.
[0027] For phase transfer coefficients that deviate from spherical bubbles, for example, 1.3 < <1.4, correction factor fitted using experimental data. This yields the interphase heat transfer coefficients describing different bubble shapes. Optionally, the interphase heat transfer coefficient correction factor... It is the average value of the correction factor for the interphase heat transfer coefficient of multiple bubbles within a bubble deformation range.
[0028] Optionally, the correction factor can be obtained by performing a third-order polynomial fitting. After correction by the correction factor, the error of the interphase heat transfer coefficient can be greatly reduced, and the prediction accuracy can be significantly improved.
[0029] It should be noted that the bubble Reynolds number ,in, , and The bubble velocity, liquid phase viscosity, and bubble diameter are all factors in the bubble's dynamic range. The bubble Reynolds number represents the ratio of inertial force to viscous force acting on the bubble. It is used to determine the flow state of the fluid around the bubble and affects the bubble's shape, rising velocity, and wake structure.
[0030] Jacob's number ,in, The vapor phase temperature. The liquid phase temperature, For liquid phase heat capacity, The density of the liquid phase is... The density is the gas phase density. This is the latent heat of vaporization. Physically, it is the ratio of the heat absorbed by a liquid during superheating to the heat absorbed by an equal volume of liquid during vaporization.
[0031] Prandtl number ,in, The liquid phase thermal diffusivity, This is the kinematic viscosity of the liquid phase.
[0032] In another example, you can also directly... As the interphase heat transfer coefficient for spherical and deviating-spherical bubbles, instead of defining the aspect ratio threshold, i.e., using The interphase heat transfer coefficient of the bubbles is determined, which will not be elaborated here.
[0033] As a comprehensive example, the heat transfer coefficient between deformed bubbles is calculated based on the above example:
[0034] According to an embodiment of the present invention, a relationship between the aspect ratio of bubbles and dimensionless parameters (Weber number, Morton number) is constructed. Based on this, using the heat transfer coefficient of spherical bubbles as a benchmark, the aspect ratio is introduced as a correction factor to clarify the heat transfer enhancement effect caused by morphological changes in non-spherical bubbles, thereby improving the prediction accuracy of the interphase heat transfer coefficient of deformed bubbles.
[0035] This invention also provides a device for predicting interphase heat transfer coefficient based on changes in bubble morphology, as described in the following embodiments. Since the principle behind this device is similar to the method for predicting interphase heat transfer coefficient based on changes in bubble morphology, the implementation of this device can refer to the implementation of the method for predicting interphase heat transfer coefficient based on changes in bubble morphology; repeated details will not be elaborated further.
[0036] Figure 3 This is a schematic structural diagram of an example of a device for predicting interphase heat transfer coefficient based on bubble morphology changes according to an embodiment of the present invention. Figure 3 As shown, the interphase heat transfer coefficient prediction device based on bubble morphology change according to an embodiment of the present invention includes: The parameter acquisition module 60 is used to acquire the physical parameters of the bubbles under the target working condition. The physical parameters include at least the liquid phase density, liquid phase kinematic viscosity, bubble diameter, surface tension, liquid phase density, vapor phase density, gravitational acceleration, liquid phase dynamic viscosity, bubble velocity, vapor phase temperature, liquid phase temperature, liquid phase heat capacity, latent heat of vaporization, and liquid phase thermal diffusivity. The parameter determination module 70 is used to determine the Weber number and Morton number of the bubble based on the physical parameters. The aspect ratio acquisition module 80 is used to input the Weber number and the Morton number into a preset aspect ratio prediction model to obtain the aspect ratio of the bubble, wherein the aspect ratio prediction model is... , Aspect ratio, For Weber numbers, The Morton number is used, and the constants U1, U2, and U3 are obtained by fitting visual experimental data of the steam-water two-phase system. The coefficient acquisition module 90 is used to obtain the interphase heat transfer coefficient of the bubbles based on the physical parameters and the aspect ratio.
[0037] This invention also provides a computer device. Figure 4 This is a schematic structural diagram of an example of a computer device according to an embodiment of the present invention. Figure 4 As shown, the computer device 500 according to an embodiment of the present invention includes a memory 510, a processor 520, and a computer program 530 stored in the memory 510 and executable on the processor 520. When the processor 520 executes the computer program 530, it implements the above-described method for predicting the interphase heat transfer coefficient based on changes in bubble morphology.
[0038] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for predicting interphase heat transfer coefficients based on changes in bubble morphology.
[0039] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described method for predicting interphase heat transfer coefficients based on changes in bubble morphology.
[0040] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0041] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0042] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0043] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0044] The meanings and units of the various physical parameters according to embodiments of the present invention are shown in the following table:
[0045]
[0046] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A method for predicting interphase heat transfer coefficient based on changes in bubble morphology, characterized in that, include: Obtain the physical parameters of the bubbles under the target working condition, wherein the physical parameters include at least the liquid phase density, liquid phase kinematic viscosity, bubble diameter, surface tension, vapor phase density, gravitational acceleration, liquid phase dynamic viscosity, bubble velocity, vapor phase temperature, liquid phase temperature, liquid phase specific heat capacity, latent heat of vaporization, and liquid phase thermal diffusivity. Based on the physical parameters, determine the Weber number and Morton number of the bubble; The Weber number and the Morton number are input into a preset aspect ratio prediction model to obtain the aspect ratio of the bubble, wherein the aspect ratio prediction model is: , Aspect ratio, For Weber numbers, The Morton number is used, and the constants U1, U2, and U3 are obtained by fitting visual experimental data of the steam-water two-phase system. Based on the physical parameters and the aspect ratio, the interphase heat transfer coefficient of the bubbles is obtained.
2. The method as described in claim 1, characterized in that, Based on the physical parameters, the Weber number and Morton number of the bubble are determined, including: According to the formula Determine the Weber number of the bubble, where, This refers to the inertial force during the movement of air bubbles. The surface tension during the bubble movement process. The density of the liquid phase is... The viscosity is the kinematic viscosity of the liquid phase. The diameter of the bubble is _____. Surface tension; According to the formula Determine the Morton number of the bubble, where, The viscous force of the bubbles. Let g be the buoyancy force of the bubble, and g be the acceleration due to gravity. Where is the density of the vapor phase. This is the dynamic viscosity of the liquid phase.
3. The method as described in claim 1, characterized in that, The aspect ratio prediction model is as follows: 。 4. The method according to any one of claims 1 to 3, characterized in that, Based on the physical parameters and the aspect ratio, the interphase heat transfer coefficient of the bubbles is obtained, including: When the aspect ratio is below a preset threshold, Determine the interphase heat transfer coefficient of the bubbles; When the aspect ratio is greater than a preset threshold, Determine the interphase heat transfer coefficient of the bubbles, wherein, For the bubble Reynolds number, For Jacob's number, The Prandtl number, the bubble Reynolds number, the Jacobian number, and the Prandtl number are obtained through the physical parameters. To the aspect ratio of the bubbles Related interphase heat transfer coefficient correction factor, interphase heat transfer coefficient correction factor The constants C, n, m, and r were obtained by fitting the visualized experimental data of the steam-water two-phase system.
5. The method according to any one of claims 1 to 3, characterized in that, Based on the physical parameters and the aspect ratio, the interphase heat transfer coefficient of the bubbles is obtained, including: by Determine the interphase heat transfer coefficient of the bubbles, wherein, For the bubble Reynolds number, For Jacob's number, The Prandtl number, the bubble Reynolds number, the Jacobian number, and the Prandtl number are obtained through the physical parameters. To the aspect ratio of the bubbles Related interphase heat transfer coefficient correction factor, interphase heat transfer coefficient correction factor The constants C, n, m, and r were obtained by fitting the visualized experimental data of the steam-water two-phase system.
6. The method as described in claim 4, characterized in that, The interphase heat transfer coefficient correction factor It is the average value of the correction factor for the interphase heat transfer coefficient of multiple bubbles within a bubble deformation range; and / or The interphase heat transfer coefficient correction factor ; and / or 。 7. A device for predicting interphase heat transfer coefficient based on changes in bubble morphology, characterized in that, include: The parameter acquisition module is used to acquire the physical parameters of the bubbles under the target working conditions. The physical parameters include at least the liquid phase density, liquid phase kinematic viscosity, bubble diameter, surface tension, liquid phase density, vapor phase density, gravitational acceleration, liquid phase dynamic viscosity, bubble velocity, vapor phase temperature, liquid phase temperature, liquid phase heat capacity, latent heat of vaporization, and liquid phase thermal diffusivity. The parameter determination module is used to determine the Weber number and Morton number of the bubble based on the physical parameters. The aspect ratio acquisition module is used to input the Weber number and the Morton number into a preset aspect ratio prediction model to obtain the aspect ratio of the bubble, wherein the aspect ratio prediction model is... , Aspect ratio, For Weber numbers, The Morton number is used, and the constants U1, U2, and U3 are obtained by fitting visual experimental data of the steam-water two-phase system. The coefficient acquisition module is used to obtain the interphase heat transfer coefficient of the bubbles based on the physical parameters and the aspect ratio.
8. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1 to 6.
9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 6.
10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 6.