[itaniOmar]

Hello everybody,

I am using the mhdFoam solver to study the hartmann problem for conducting walls in a rectangular duct. I ran my simulation and got the velocity and pressure distribution . I wanted to validate these results using Comsol, and i got approximately the same results for the velocity, whereas the pressure value were much much bigger (deltaP= 430 Pa on comsol whereas on mhdFoam it was more like 0.02).
I think the pressure term in mhdFoam represents the static pressure divided by density so in order to obtain the static pressure i must multiply by rho, however i still end up having a large difference in results given that rho=900.

I also ran this for multiple values of applied magnetic field and therefore hartmann numbers and the pressure only slightly increases as the Ha increases on mhdFoam, whereas it is completly the opposite for Comsol which probably makes more sense. Can anyone exactly point out what is the problem and difference in terms of resolving the pressure in mhdFoam?