Good morning!.

Im preparing a model of a rock porous medium acrosed by air.

Im studing how change the temperature in the porous media. I was defining the porous media element in the data base, but when i needed to define the "volumetric heat exchange coefficient" i had doubts abaut the coeffient.

- Im not sure if the "volumetric heat exchange coefficient" is the same like "Volumetric heat transfer coeficient". Becasuse in the program the "volumetric heat exchange coeficient" is defined by the unit W/m3/K and the "Voumetric heat transfer coeficient" by W/(m3*K).

- And finally I´m not sure where i can find the data of the coefficient, almost a reasonable data.

Thanks for your help.

the names are different

the units are different

so yes, they are different

the one for the porous medium is based on the porous medium properties

there was a discussion about this recently. if you don't have that parameter you need to calculate/estimate it