Dynamic viscosity prediction with density correction. Chung method. Fails because the molar volume V is not supplied
function gasViscTVcpChung input FreeFluids.MediaCommon.DataRecord data; input SI.Temperature T "Gas temperature"; input SI.DynamicViscosity eta0In = 0 "low density viscosity, if known"; output SI.DynamicViscosity eta "Dynamic viscosity"; end gasViscTVcpChung;