Porosity and heat transfer characteristics analysis of Stirling cryocooler regenerator using darcy permeability and forchheimer coefficient

Darcy Permeability and Forchheimer Coefficient are important parameters considered when flow through a porous media and oscillatory flows are studied. Both of these terms are due to micro scale or pore scale flow phenomenon which results in macroscopic pressure gradient. In this paper calculation of Porosity and Heat Transfer characteristics of Stirling cycle Cryocooler using Darcy Permeability and Forchheimer Inertia Coefficient, as a function of Wire Diameter is presented. The basic objective of this work is to optimize the current regenerator at TIFR by predicting porosity and heat transfer characteristics solely by using the geometry. CFD simulation study of pressure/temperature/velocity along the length of the Regenerator have been done by using Porous model in ANSYS R15.0 and the porosity of Regenerator was calculated using REGEN 3.3 Numerical Analysis Software for Regenerators.