Abstract: As a typical porous media material,wire mesh is often used in pulse tube regenerators,Stirling regenerators,solid filters,etc.In this paper,micron-scale stainless steel wire mesh is used as the porous medium filler,and the porosity,viscous resistance factor,inertial resistance factor and other parameters are obtained from the characteristics of the wire mesh material.The resistance characteristics of stainless-steel wire mesh packing are obtained by numerical simulation of the combination of physical models such as different wire mesh thicknesses and different flaring openings.The results show that when the thickness of the wire mesh packing increases from 0.2 mm to 0.8 mm,the pressure drop increases linearly.When the opening of the divergent opening increases from 30°to 60°,there is no obvious change in the flow state of the fluid before and after passing through the wire mesh.When the internal flow state in the porous medium is laminar flow,the pressure drop is proportional to the mass flow rate.