Numerical Analysis of Horizontally Placed Closed Loop Pulsating Heat Pipe for Electronic Cooling

Abstract

– Numerical analysis of horizontally placed open and closed loop pulsating heat pipe (CLPHP) is carried with water as working fluid. The filling ratio (FR) of working fluid is taken as 77 %. The processor of laptop act as heat source. The 3D Computational domain is prepared with the help of Ansys design modeler. The Volume of Fluid (VOF) Approach is used to simulate the liquid vapor slug flow in horizontally placed open and closed loop pulsating heat pipe. Adaptive simulation settings with the time step of 0.0005 is selected to capture the movement of liquid and vapor slug flow. The contour of liquid volume fraction, wall temperature and visualized in the analysis. The objective of numerical simulation is to predict the behaviour and to understand the flow pattern of liquid vapor slug flow during the complex process of evaporation and condensation. The maximum temperature recorded for heat source is 323 K.