Air permeability is an important factor in the performance of textile materials, e.g., gas filters or fabrics for air bags.

The first FlowDict GeoApp performs an air permeability test on the loaded structure. By clicking Edit the result file name and the pressure drop can be edited. For the solver LIR or SimpleFFT can be selected. The permeability is computed using Navier-Stokes(-Brinkman).

Using the default settings, an air permeability test in Z-direction with a pressure drop of 125 Pa is done for the current structure, according to ASTM D737 - 04.