jjn9128 wrote: ↑
Mon Jan 04, 2021 1:16 pm
CzS is calculated using the surface pressure integral?! Or am I confusing the question?
Possibly. Let me explain what I have tried to do.
1. I calculated integral(p_static * Cell_Area * nz *dA) where nz is the zeta vector of the normal versor to the cell. What I get is a CzS of about ~-10, that is because I have "unbalanced" surface where the tires contact patch is.
2. I calculated integral( [p_static-p_amb] * Cell_Area * nz *dA) and in this case I get CzS ~-2.2 which seems more reasonable. In this way I am counterbalancing the effect of not having any surface on the contact patches and "sort of accounting for the ground reaction".
Though -2.2 is way short of the -3.4 that I should get with my geometrical setup and my question basically is: "am I getting the wrong CzS because I calculate it in the wrong way or because of the not rotating wheels or because my CFD is wrong somewhere else?"
Not sure you can help, but i hope you can give me some hints