Method for simulating air flow field in pulmonary alveolus
A simulation method, air flow field technology, applied in software simulation/interpretation/simulation, special data processing applications, instruments, etc., which can solve problems such as low simulation accuracy
Active Publication Date: 2014-10-08
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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[0004] Based on this, it is necessary to provide a simulation method for the air flow field in the alveoli to solve the problem of low simulation accuracy
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[0045] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0046] like figure 1 As shown, it is a schematic flow diagram of an embodiment of the method for simulating the air flow field in the alveoli of the present invention, including steps:
[0047] Step S101: Carry out grid modeling for the alveoli according to the geometric data of the alveoli, establish an alveolar dynamic grid model, and set the air flow field pressure and mass flux for initialization of the alveolar dynamic grid model;
[0048] The geometric data of alveoli may refer to the geometric data of a certain segment of alveoli. The geometric data may include: tube length parameters, lumen diameter, alveolar diameter, center distance between two alveoli, alveolar opening angle, and respiratory parameters. For example, it could be the 18th alveolar. The geometrica...
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A method for simulating an air flow field in a pulmonary alveolus comprises the following steps: mesh modeling is performed on the pulmonary alveolus according to geometric data of the pulmonary alveolus, a dynamic mesh model of the pulmonary alveolus is built, and initial air flow field pressure and mass flux of the dynamic mesh model of the pulmonary alveolus are set; a momentum model of the air flow field is solved according to the set initialized air flow field pressure and mass flux , and a first speed of the air flow field is determined according to the momentum model; a modified model is obtained according to a continuity equation of the air flow field, and a modified pressure value, a modified speed value and a modified mass flux value are acquired through verification; whether a convergence condition is met is determined according to the preset convergence condition, if yes, an air flow field simulation result is acquired, otherwise, the initialized air flow field pressure and mass flux are replaced with the modified pressure value and the modified mass flux value, and the modified pressure value, the modified speed value and the modified mass flux value are re-calculated until the convergence condition is met. With adoption of the scheme, the air flow field simulation accuracy is increased.
Description
technical field [0001] The invention relates to the technical field of alveolar simulation detection, in particular to a method for simulating air flow field in alveoli. Background technique [0002] The main function of human respiration is to provide oxygen to various tissues of the body and remove carbon dioxide waste gas. The respiration process of the human body can be divided into two stages: the gas is delivered from the external environment to the blood; the gas enters various tissues through the blood. With the continuous progress of society and economy, human beings have continuously improved the quality requirements of the living environment, and their awareness of the protection of the living environment has gradually increased. Particulate pollution caused by industrial production and environmental degradation has become one of the important indicators for evaluating the quality of life and air quality. In atmospheric aerosol particle pollution, some of the tin...
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Inventor 李德波徐齐胜刘亚明
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID