A Simulation for the Piston Effect in Supercritical Carbon Dioxide with the Non-flow Model
A Simulation for the Piston Effect in Supercritical Carbon Dioxide with the Non-flow Model作者机构：Institute of Engineering Thermophysics Chinese Academy of Sciences University of Chinese Academy of Sciences
出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)
年 卷 期：2013年第22卷第5期
页 面：472-477页
核心收录：
基 金：financially supported by the National Basic Research Program of China (973 Program) under Grant No.2012CB933200 the National Natural Science Foundation of China under Grant No.51161140332
主 题：Piston effect Carbon dioxide Supercritical Thermal properties
摘 要：A simulation for piston effect in supercritical carbon dioxide by employing a simple model is conducted. In the first place, the thermal properties of carbon dioxide near its liquid-vapor critical point are discussed. It is calcu- lated that the heat capacity ratio and isobaric expansion coefficient of supercritical fluids are extremely high. Furthermore, the simulation for piston effect in supereritical carbon dioxide between two infinite vertical walls is presented. The numerical results prove that piston effect has a much faster speed of heat transfer than thermal conduction under mierogravity conditions. Moreover, the piston effect turns out to be stronger when closer to the critical point.
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