气体自由膨胀的数值模拟实验设计  

Numerical Simulation Experiment Design of Gas Free Expansion

作　　者：徐雷 XU Lei(School of Physics and Electronic Information,Dezhou Universit y,Dezhou Shandong 253023,China)

机构地区：[1]德州学院物理与电子信息学院,山东德州253023

出　　处：《德州学院学报》2023年第4期93-97,共5页Journal of Dezhou University

摘　　要：气体自由膨胀是一个意义重大且相对简单的分子运动过程。采用蒙特卡罗方法数值模拟气体分子自由膨胀过程,发现气体分子随着分子随机移动次数的增加而逐渐趋近于均匀分布在系统各处,同时其熵一直在增加,直到系统达到稳定状态时,熵才逐渐趋于稳定。此数值模拟结果与理论结果符合较好,而且数值模拟方法还展现出理论方法和实验方法都无法比拟的优越性。此案例不仅能够进一步丰富计算物理学实验教学内容,还可以作为计算物理学与其他物理学科交叉的一个范例,为计算物理学应用于物理实际问题提供合适的参考。Gas free expansion is a significant and relatively simple molecular motion process.By using the Monte Carlo method to numerically simulate the gas molecules free expansion process,it is found that gas molecules gradually tend to be uniformly distributed throughout the system with the increase of the number of random movement of molecules.At the same time,the entropy keeps increasing until the system reaches a stable state.The numerical simulation results are in good agreement with the theoretical results,and the numerical simulation method also exhibits an unparalleled superiority over both theoretical and experimental methods.This case can not only further enrich the experimental teaching content of computational physics,but also serve as an example of the intersection between comput ational physics and other physics disciplines,and provide a suitable reference for the application of computa tional physics to practical physics problems.

关 键 词：气体自由膨胀 蒙特卡罗 数值模拟 计算物理学 

分 类 号：O522.3[理学—高压高温物理]