Re: Force darcy fluid flow component to zero
Posted by
Precise Simulation on
URL: http://forum.featool.com/Force-darcy-fluid-flow-component-to-zero-tp1286p1288.html
kmh435 wrote
Hello,
I'm working on a 3D Darcy fluid flow model with hydraulic gradients in the x and the z. I have a lower permeability subdomain within another subdomain.
Unexpectedly, there is a small component of flow in the y-direction near the interior boundary of the subdomain, probably due to the difference in permeability. I’d like to set this zero in case it affects the thermal properties I’m considering. Is there a simple approach by editing the Darcy equation? Or another approach? I’ve tried deleting the py_y variable from the equation to no effect.
Basically (-kap_dl/eta_dl*py) needs to be set to zero for the duration of simulation.
Thanks!
kevin
Hi Kevin,
There is no standard way to enforce or fix a gradient pointwise in domains, as you've noticed omitting "py_y" does not enforce a constraint (the variable/gradient can still be influenced by boundary conditions and other variables). The best to proceed depends a little on the end goal, if its possible to attach a model or script file I might be able to give better suggestions.