3-Dimentional numerical simulation on internal flow and mixing process of an anesthesia vaporizer / 生物医学工程学杂志

ABSTRACT

The function theory of an anesthesia vaporizer was studied and the geometry configuration was measured in this study. The internal gas flow and mixing process in the anesthesia vaporizer were simulated using CFD method. Applying tracking in turbulent flow to stochastic particle, for the droplet of anesthesia drug, the moving track of droplet was traced. Based on the results, the internal gas flow variation, the concentration distribution of anesthesia drug volatilization process and mixing process with gas were ascertained. Numerical simulation results showed that, the diluted gas velocity reduction of internal flow in the anesthesia vaporizer was higher. Because of the anesthesia vaporizer geometry, the mixing process between anesthesia drug vapor and diluting gas was not homogeneous. This also influenced the stability and accuracy of anesthesia drug concentration. The optimization precept of anesthesia vaporizer is ascertained.