Numerical simulation of a 2-D Cryogenic Pulsating Heat Pipe (CPHP) is carried out. Liquid nitrogen is considered as working fluid. The Volume of Fluid (VOF) model is used to simulate two-phase liquid–vapor flow in a CPHP. Filling Ratio (FR) is kept in the range of 25–70%. The evaporator temperature is set in the range of 85–115 K. The condenser temperature of 76 K is set constant. The volume fraction results of liquid nitrogen are studied for different operational conditions. A detailed qualitative and quantitative analysis is performed for working fluid temperature, adiabatic wall temperature and flow circulation velocity. Power spectrum density (PSD) and the Autocorrelation function (ACF) tools are used to analyze adiabatic wall temperature-time series data. Thermal oscillations are observed with dominant frequency in the range of 0.25–1.85 Hz.

进行了二维低温脉动热管（CPHP）的数值模拟。液氮被认为是工作流体。流体体积（VOF）模型用于模拟CPHP中的两相液体-蒸汽流。填充率（FR）保持在25–70％的范围内。蒸发器温度设定在85–115 K范围内。冷凝器温度76 K设定为恒定值。研究了不同操作条件下液氮的体积分数结果。对工作流体温度，绝热壁温和流循环速度进行了详细的定性和定量分析。功率谱密度（PSD）和自相关函数（ACF）工具用于分析绝热壁温度-时间序列数据。观察到主频率在0.25-1.85 Hz范围内的热振荡。