76 results about "Fluid layer" patented technology

The invention relates to the technical field of physical acoustics, in particular to a saturated porous medium metasurface Portrait wave frequency dispersion relation calculation method and system, and the method comprises the following steps: obtaining expressions of solid skeleton displacement, fluid relative displacement, total stress, solid shear stress and pore pressure under the action of Portrait waves; obtaining an expression of a fluid displacement component and a fluid normal stress; obtaining an expression about the relative motion of the resonator; according to all the expressions, stress and displacement continuity boundary conditions are applied to the interface of the saturated porous medium and the fluid layer, a characteristic equation of frequency dispersion characteristics is obtained and solved, and a frequency dispersion curve is obtained. According to the method, the explicit frequency dispersion relation of the saturated porous medium metasurface portrait waves is provided, the calculation efficiency and prediction precision of complex interface wave propagation are improved, the optimal design of the metasurface resonator array can be guided, and a key theoretical tool and technical support are provided for design of high-performance acoustic functional devices and structures.

The invention relates to a micro-fluidic chip integrated with a pneumatic micro valve, a preparation method and a use method. The micro-fluidic chip comprises an interface gas layer, a thin film layer and a fluid layer, the film layer is arranged between the interface gas layer and the fluid layer; the thin film layer is provided with a plurality of concentration gradient control channels, each concentration gradient control channel comprises a dilution inlet, a pneumatic micro-valve array, an observation area and an outlet which are connected in sequence, liquid enters the concentration gradient control channels through the dilution inlets, enters the flow channels provided with the pneumatic micro-valve arrays through the fishbone-shaped mixing micro-channels, and enters the flow channels through the fishbone-shaped mixing micro-channels; pneumatic micro valves in the pneumatic micro valve array are controlled through the interface gas layer so as to realize dynamic regulation and control of concentration gradients, and the fluid layer is used for accommodating dilution liquids with different concentration gradients; the observation area is used for observing diluted liquid in the fluid layer. The technical problem of real-time reconstruction of the concentration gradient of the micro-fluidic chip in the experiment process is solved, and the dynamic experiment requirements of scenes such as cell migration observation and drug time-varying response are met.

A medical pad for exchanging thermal energy between a targeted temperature management (TTM) fluid and a patient is disclosed. The pad can include a fluid containing layer and a fluid conduit attached therewith via rotatable joint where the joint is configured to facilitate rotation of the fluid conduit with respect to the pad. A method of manufacturing the pad can include coupling a first member of the rotatable joint to a fluid delivery line, coupling the second member to the fluid containing layer, and inserting the first member within an opening of the second member to facilitate a snap-fit retention mechanism between first member and the second member. A method of using the pad can include rotating the fluid delivery line relative to the thermal pad via the rotatable joint when initially applying the pad to the patient or when adjusting an orientation of the pad on the patient.

The utility model relates to a drying facility which comprises two hydrodynamic pads which are arranged on the two sides of a strip in a face-to-face mode, the strip is configured to advance between the two hydrodynamic pads in the limited advancing direction from upstream to downstream, the length of each hydrodynamic pad extends in the width direction of the strip, and the width of each hydrodynamic pad is larger than the width of the strip. The fluid dynamic pad is configured to follow a clamping plane transverse to the strip during advancing of the rolled strip to be applied with mutually facing pressure on both sides of the rolled strip, the fluid dynamic pad is configured to slide on the rolled strip through a fluid layer, and the fluid dynamic pad is configured to slide on the rolled strip along with the clamping plane transverse to the strip. The utility model relates to a device for drying a strip, comprising:-at least one hydrodynamic pad, each configured to perform a first drying operation by blocking at least a portion of a lubricating layer of the strip from upstream to downstream,-at least one suction hole, downstream of said hydrodynamic pad, configured to suck in at least a portion of a residual lubricating layer, thereby performing a second drying operation on said strip.

The invention discloses a laminar flow micro-fluidic chip and method for detecting spatial heterogeneous drug distribution influence, the chip comprises a fluid layer and a control layer, the fluid layer comprises a first main inlet and a second main inlet, the fluid layer further comprises a plurality of independent cell culture chambers of an array, the control layer comprises a control valve inlet and a pneumatic valve array, and the control valve inlet is communicated with the pneumatic valve array. The independent cell culture chamber is composed of a concave cavity, the independent cell culture chamber is provided with two semicircular enclosures, a first channel inlet and a second channel inlet are formed in the independent cell culture chamber, and peristaltic pump subunits are arranged on the first channel inlet and the second channel inlet. Laminar flow control is achieved by integrating the pneumatic valve and the peristaltic pump, and chemical gradient generation and cell response monitoring of micron-sized spatial resolution are achieved through automatic control.

The invention relates to a method for wringing a rolled strip (2), the method comprising: - / A / Providing a wringing installation comprising two hydrodynamic pads (6), extending lengthwise over a width of the rolled strip (2), - / B / Advancing said rolled strip (2) between two hydrodynamic pads (6) in a defined direction (V) from upstream to downstream, - / C / Applying pressure to the hydrodynamic pads (6) one towards the other on either side of the rolled strip (2), along a clamping plane transverse to the strip, during the advance of said rolled strip (2), the hydrodynamic pads (6) sliding on the rolled strip (2) by means of a layer of fluid, each of the hydrodynamic pads (6) performing a first wringing operation by blocking at least a portion of a lubricant layer of the strip coming From upstream to downstream, - / D / Aspiration,via a suction orifice (9) located downstream of the hydrodynamic pads (6) of at least part of a residual layer of fluid, thus performing a second wringing operation on the belt. The invention also relates to an associated wringing installation.

The invention relates to the field of cooling, and discloses a liquid cooling system and electronic equipment, and the system comprises a cold plate which can accommodate a heat dissipation medium; the liquid supply assembly is used for providing a heat dissipation medium for the cold plate; and the pulse flow adjusting assembly is arranged between the liquid supply assembly and the cold plate and used for enabling the heat dissipation medium to form pulse flow, and the pulse flow enters the cold plate. A cooled surface is directly impacted by a pulse flow, a heat boundary layer on the surface can be instantly damaged and washed away, the heat exchange efficiency can be seriously hindered by the almost static fluid layer with very high temperature, the limitation can be broken by periodic impact brought by the pulse flow, new cold fluid is in direct contact with the heat exchange surface, and the heat exchange efficiency is improved. Therefore, a high instantaneous convective heat transfer coefficient is generated, and the problem that the heat transfer coefficient is difficult to increase due to stable thickening of the heat transfer boundary layer is effectively solved.

The present application relates to a thinning device and method. The thinning device includes: a polishing platen for carrying a wafer, the polishing platen being rotatable about an axis; a grinding wheel disposed above the polishing platen, the grinding wheel being used for vertically feeding to act on the wafer to grind the wafer; and a magnetorheological fluid layer located below the polishing platen and connected to the polishing platen; establishing a damage function model of wafer damage; based on the collected vibration acceleration signals and the damage function model, determining the grinding wheel rotation speed, the grinding fluid flow rate, the grinding fluid supply flow rate, the grinding fluid injection angle, the grinding wheel feeding pressure, the polishing platen rotation speed, the magnetorheological fluid regulation pressure, and the magnetorheological fluid support stiffness, and applying them to the next wafer processing. By adjusting the parameters, the wafer damage layer is reduced and the wafer quality is improved.

The application discloses a kind of crosslinked polyethylene insulated power cables for ocean engineering, including outer covering, armoring layer, inner sheath, filling layer and three conductor structures;Buffer system is also provided at filling layer, buffer system includes fluid layer close to inner sheath, and fluid layer is filled with buffer fluid;Three buffer bodies are set between three conductor structures, buffer body is sequentially set into surface layer, intermediate layer and inner layer from fluid layer towards the direction of cable center, surface layer is in contact with fluid layer, and surface layer and fluid layer are communicated by a plurality of pores, surface layer is filled with polygonal hole structure, and the buffer fluid entering is guided to form laminar flow;Intermediate layer is filled with fractal pore structure, and the buffer fluid entering is guided to travel vortex flow;Inner layer is tubular hole structure, and is communicated with fluid layer, by guiding buffer fluid directional flow when under pressure, avoid local stress concentration, while forming three-dimensional multi-layer pressure distribution, prevent cable from being damaged under high strength pressure.

This invention discloses a skin organ-on-a-chip, relating to the fields of biomedical engineering and microfluidics. The chip includes a drive module integrating a reservoir with a fixed height difference, a culture layer with arrayed independent skin culture units, and a fluid layer separated by a porous membrane. The drive module utilizes the hydrostatic pressure generated by the liquid level difference to drive the culture medium to form a stable laminar flow in an optimized fluid channel network, achieving pump-free perfusion. This invention achieves stable pump-free drive through a reservoir with a fixed height difference; the integrated sealed structure eliminates the risk of contamination and ensures complete isolation between units; the simulation-optimized uniform flow channel network, in synergy with the drive, ensures high consistency in high-throughput parallel culture, enabling the chip to provide a long-term stable biomimetic perfusion microenvironment. A single experiment can efficiently complete multiple replicates and multi-condition transdermal drug screening, toxicity testing, and disease model construction, improving experimental throughput, data reliability, and ease of operation.

The invention provides a temperature prediction method and system for geothermal fluid at an outlet of a geothermal field, and belongs to the technical field of geothermal development. The method for predicting the temperature of the geothermal fluid at the outlet of the geothermal field comprises the following steps: dividing a development target interval to obtain a plurality of thermal storage fluid layers of the development target interval and interpretation data of each thermal storage fluid layer; according to the interpretation data of each thermal storage fluid layer in the development target interval, determining the heat obtained after geothermal fluid in each thermal storage fluid layer reaches a wellhead from the current thermal storage fluid layer in unit time; according to the heat which can be obtained after the geothermal fluid in each thermal storage fluid layer reaches the wellhead from the current thermal storage fluid layer in unit time, the heat which can be obtained after the geothermal fluid in the development target interval reaches the wellhead is determined; and according to the heat obtained after the geothermal fluid in the development target interval reaches the wellhead, the temperature of the geothermal fluid in the development target interval after the geothermal fluid reaches the wellhead is estimated.

The invention relates to a thinning device and method, and the device comprises a grinding disc which is used for bearing a wafer, and the grinding disc can rotate around a shaft; the grinding wheel is arranged above the grinding disc and is used for feeding and acting on the wafer in the vertical direction so as to grind the wafer; the magnetic fluid layer is positioned below the grinding disc and is connected to the grinding disc; establishing a damage function model of wafer damage; and based on the collected vibration acceleration signal a (t) and the damage function model, the rotating speed w of the grinding wheel, the flow velocity vt of the grinding fluid, the supply flow Qt of the grinding fluid, the spraying angle theta j of the grinding fluid, the feeding pressure Pg of the grinding wheel, the rotating speed wcarrier of the grinding disc, the adjusting pressure Pm of the magnetic fluid and the supporting rigidity Km of the magnetic fluid are determined and applied to next wafer machining. The wafer damage layer is reduced by adjusting parameters, and the wafer quality is improved.

To suppress deterioration in the performance of a heat exchanger. [Solution] The heat exchanger comprises a plurality of stacked fluid layers (100) and a partition member (400) arranged between adjacent fluid layers (100) in a stacking direction (V1) of the plurality of fluid layers (100). The multiple fluid layers (100) include a first layer (110) and a second layer (120) adjacent to each other in the stacking direction (V1), the first layer (110) includes a first part (M1) and a second part (M2), the second layer (120) includes a third part (M3) and a fourth part (M4), and when viewed in the stacking direction (V1), the first part (M1) and the third part (M3) have a portion where they overlap each other, and the second part (M2) and the fourth part (M4) have a portion where they overlap each other, and at least a portion of the first gap (S1) and at least a portion of the second gap (S2) are separated from each other.

The invention relates to the technical field of flexible connecting pipelines, and discloses a fluid supporting hose which comprises a corrugated pipe, the corrugated pipe is a thin-wall shell, the two ends of the corrugated pipe 1 are fixedly connected with connecting pipes respectively, the outer side of the corrugated pipe is coated with a fluid layer, and the fluid layer 3 is fixedly connected with the connecting pipes. The fluid layer is connected with a pressure balancing device, the fluid layer is communicated with one end of the pressure balancing device, the other end of the pressure balancing device is communicated with the corrugated pipe, the outer side of the fluid layer is coated with a woven layer, and the two ends of the woven layer are fixedly connected with the connecting pipe; the flexible pipe has a smaller bending radius, the bending fatigue life is effectively prolonged, the braided layer is prevented from being separated from a pressure-bearing state, and the flexible pipe still has good pressure-bearing capacity in an extremely-small bending state.

The present invention proposes a PD-FEM-FVM efficient simulation and analysis method and system for engineering rock mass stress-seepage coupling, comprising: establishing corresponding size models for the solid layer and the fluid layer respectively according to actual engineering; applying initial boundary conditions to the entire established model; calculating the solid layer and the fluid layer respectively based on the applied initial boundary conditions, judging whether the bonds of the material points meet the failure conditions according to the displacement of the near-field dynamic material points in the solid layer, recording the local damage, and then describing the fracture of the rock mass; and obtaining the flow field distribution of the entire model according to the pressure of the FVM control body in the fluid layer, thereby performing efficient engineering-scale simulation of rock mass stress-seepage coupling.

This heat exchanger comprises: a plurality of stacked fluid layers (100); and a partition wall member (400) disposed between the fluid layers (100) adjacent to each other in the stacking direction (V1) of the plurality of fluid layers (100). The plurality of fluid layers (100) include a first layer (110) and a second layer (120) adjacent to each other in the stacking direction (V1). The first layer (110) includes a first component (M1) and a second component (M2), and the second layer (120) includes a third component (M3) and a fourth component (M4). When viewed in the stacking direction (V1), the first component (M1) and the third component (M3) have locations overlapping each other, the second component (M2) and the fourth component (M4) have locations overlapping each other, and at least a portion of the first gap (S1) and at least a portion of the second gap (S2) are separated from each other.

The invention relates to a jacketing machine for a heat exchange component of a soil cold and heat storage system. The jacketing machine is characterized by comprising a winch, a protective pipe with a turnover anti-drag chassis, a water supply pipe, a water supply source and a control system. The turnable anti-drag chassis comprises a plurality of chassis fragments which are equally divided according to the 360-degree circumferential angle, and the chassis fragments are connected with the bottom end of the protective pipe through a one-dimensional rotating pair mechanism. The bottom surface of the turnable anti-drag chassis is an anti-drag surface and comprises a plurality of outlet holes; the outlet holes are communicated with a water supply source through a water supply network and a water supply pipe. The sling is put down the protection pipe, water flows out of the outlet holes, the soil on the drag reduction surface is slurried through water outflow, and a fluid thin layer is formed between the soil boundary and the drag reduction surface; the resistance of the fluid thin layer to the protective pipe is extremely weak, and the protective pipe is formed under the action of the gravity of the protective pipe and conveys the heat insulation sleeve to a designated position; then the outlet hole stops discharging water, so that the winch is paused; and the heat insulation sleeve is fixedly connected with the heat exchange component, and finally the winch pulls up the protection pipe to return.

Instrument for performing a diagnostic test on a fluidic cartridge A cartridge reader is for carrying out a diagnostic test on a sample contained in a fluidic cartridge inserted into the reader. The fluidic cartridge comprises a fluidic layer comprising at least one sample processing region, at least one collapsible blister containing a liquid reagent, a pneumatic interface, an electrical interface and at least one mechanical valve. The reader comprises a housing; an upper clamp occupying a fixed position relative to the reader, and a lower clamp, movable relative to the first clamp, wherein the upper clamp and the lower clamp define a cartridge receiving region therebetween. The reader comprises a thermal module comprised in the lower clamp, wherein the thermal module comprises at least one thermal stack for heating the at least one sample processing region of the cartridge inserted into the reader. The reader comprises at least one mechanical actuator for actuating the mechanical valve comprised in the cartridge inserted into the reader.

The invention discloses a three-dimensional observation device for conversion between laminar flow and turbulent flow of fluid, and belongs to the technical field of liquid state observation, the three-dimensional observation device comprises a flow monitoring unit, and the lower side of the flow monitoring unit is provided with an installation unit for installation. One side of the flow monitoring unit is provided with a backflow unit which is used for repeatedly utilizing water in the flow monitoring unit, and the lower side of the backflow unit is provided with a rotating unit which is used for selectively installing and rotating the flow monitoring unit. The fluid flow state change is converted into visual mechanical displacement indication, the conversion node from laminar flow to turbulent flow can be accurately captured, the flow state change does not need to be subjectively judged by human naked eyes, observation errors are effectively avoided, and the accuracy of fluid laminar flow and turbulent flow conversion observation is greatly improved; meanwhile, the transmission process is stable and smooth due to the limiting matching design of all the transmission parts, and the timeliness and accuracy of flow state indication are guaranteed.

The phase-changed second fluid flows in the second fluid layer (30). The second fluid passage (31) is divided into at least a first flow passage section (R1) and a second flow passage section (R2) different from the first flow passage section (R1) by at least one fold-back structure. The first flow path section (R1) is located on the condensation outlet side or the evaporation inlet side. The flow path cross-sectional area of the first flow path section (R1) is smaller than the flow path cross-sectional area of the second flow path section (R2).

This invention discloses an underwater sound-absorbing metamaterial based on synergistic coupling resonance and its applications. It comprises M×M subunits arranged periodically along a plane, each subunit consisting of N×N unit cells of uniform geometric dimensions. Each unit cell includes an upper matrix layer, a lower matrix layer, and a coupled resonance intermediate layer embedded between the upper and lower matrix layers. The coupled resonance intermediate layer is symmetrically fastened to the center of an intermediate insert with upper and lower dual harmonic oscillators, respectively, and is embedded between the upper and lower matrix layers. A fluid layer and a backing are sequentially distributed below the lower matrix layer. This underwater sound-absorbing metamaterial can synergistically couple the multi-displacement modes of the intermediate layer, as well as the synergistic coupling resonance excited together with the fluid layer and the backing, thereby forcing the upper and lower matrix layers to dissipate the wave energy in the structure to a great extent using their high loss factors.

A method for drying a rolled strip is disclosed comprising: supplying a drying facility comprising two hydrodynamic pads, respectively extending in length over a width of the rolled strip, advancing rolled strip between two hydrodynamic pads in an advancement direction defined from upstream to downstream, applying pressure of the hydrodynamic pads, one towards the other, on either side of the rolled strip, following a clamping plane transverse to the strip, during the advancement of rolled strip, the hydrodynamic pads sliding on the rolled strip by means of a layer of fluid, each of the hydrodynamic pads carrying out a first drying operation by blocking at least one portion of a lubricating layer of the strip coming from upstream towards downstream, and sucking in, via a suction orifice located downstream of hydrodynamic pads, at least a portion of a residual fluid layer, thus performing a second drying operation of the strip.

This invention relates to the field of mixing equipment technology, and in particular to a mixing device for a selective catalyst fluid generator, comprising: a mixing cylinder having a mixing chamber, an air outlet channel formed on the right end face of the mixing cylinder, and an air inlet channel formed on the left end face of the mixing cylinder; a scraper fixed on a first feed pipe, and mixing blades installed on a second feed pipe; and a purification mechanism for removing impurities from the fluid. The purification mechanism is arranged in the air outlet channel. The rotation of the second feed pipe drives the spirally arranged mixing blades to generate a strong stirring effect. The spiral arrangement not only increases the flow path of the fluid in the mixing cylinder, but also promotes the exchange and mixing between different fluid layers. The L-shaped scraper can scrape the inner wall of the mixing cylinder, effectively preventing the fluid from depositing or scaling during the mixing process. Through the design of the purification mechanism, impurities in the fluid can be removed, improving the cleanliness of the reaction product.

The application discloses a heat dissipation structure applied to a high-power light emitting device, which comprises the following parts: a light emitting device emitting high-power laser light, wherein the light emitting device is a thin-layer type light emitting device, one side of the light emitting device is a light emitting surface, the other side is a cooling surface, the thickness of the light emitting device is A, the diameter of the light emitting area of the light emitting device is B, and A is less than B / 5; a cooling fluid layer flowing fast, which is arranged below the cooling surface and is used for absorbing and conducting the heat of the light emitting device, and the minimum distance between the cooling fluid layer and the cooling surface is C, and C is less than B / 5; and a supporting lens arranged on the light emitting surface and used for supporting and conducting light of the light emitting device, wherein the thickness of the supporting lens is D, and D is greater than 5A. The heat dissipation capacity of the high-power light emitting device can be improved, so that the power of the light emitting device is improved.

The invention discloses a method and system for simulating a submarine landslide problem based on double-layer double-phase non-local generalized particle dynamics, and belongs to the technical field of simulation calculation, and the method comprises the steps: dividing a submarine landslide calculation model into a fluid layer and a soil body layer, and respectively generating fluid material points and soil body material points; solving a fluid mass conservation equation by considering the relative speed between fluid substance points and soil substance points; calculating the nonlinear drag force between the fluid and the soil body; solving a motion equation of fluid substance points and soil substance points; updating respective substance information of the fluid substance points and the soil substance points, and applying boundary conditions; and obtaining a simulation analysis result of the submarine landslide calculation model based on the updated material information. A numerical framework is provided for researching the water-soil dynamic coupling problem of the submarine landslide, and more effective protection measures can be designed by simulating the interaction between soil and fluid, so that the influence of the submarine landslide on submarine foundations such as oil and gas pipelines and cables is reduced.

Provided are an efficient PD-FEM-FVM simulation and analysis method for construction rock mass stress-seepage coupling, and a system. An embodiment comprises: separately establishing models of corresponding sizes for a solid layer and a fluid layer according to actual construction; applying initial boundary conditions on to the model as a whole; respectively performing calculation on a solid layer and a fluid layer on the basis of the applied initial boundary conditions, determining whether bonds of material points meet a destruction condition according to displacement circumstances of peridynamic material points in the solid layer, recording a local damage situation, and further describing fracturing of the rock mass; and obtaining the flow field distribution of the model as a whole according to the pressure of an FVM cell in the fluid layer, and thereby performing efficient construction-scale simulation of rock mass stress-seepage coupling.

A method for manufacturing a substrate of a carrier plate, a bearing structure is formed in a mold, a plurality of columns are inserted, a fluid layer is formed on the bearing structure, a molten glass is covered on the fluid layer and covers the plurality of columns, after the molten glass is cooled to solidify into a glass substrate, the fluid layer, the mold, the bearing structure and the plurality of columns are sequentially removed to form a plurality of through holes on the glass substrate, so that the plurality of columns are removed to form the through holes, which is not only simple in process, but also short in process time, thus facilitating mass production.

Cart (10) for precision equipment, wherein the cart (10) comprises: a frame (20) having a plurality of supports or beams (30) to support or carry the precision equipment at a plurality of points; a plurality of fluid floaters (40) attached at several respective positions on the frame (20); and a drive element (50; 52, 54); wherein: the drive element (50; 52, 54) can be freely raised and lowered in relation to the frame (20), the majority of fluid floaters (40) float the frame (20) together with the precision equipment and are configured to be able to form a fluid layer between the frame (20) and a ground surface, and the drive element (50; 52, 54) is configured such that in a state in which the frame (20) floats, the drive element (50; 52, 54) is lowered by an elevator (26) and can be pressed against the floor surface.