OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Normal Stress/Normal Forces › Reply To: Normal Stress/Normal Forces September 22, 2021 at 2:56 pm #6016 sahilbhapkar30Participant Hello, Thank-you for your reply. I did not get you completely. There is only wall shear stress functor implemented. I dont have an idea about how to implement my own functor. Could you give some hints? Thank-you