I'm currently doing a project on solar chimney and how they can be used in a house. i chose to do the simulation on solidworks but i'm having some trouble setting up the boundary conditions properly. At first i used environmental pressure at all openings but this is creating a vortex and the results doesn't appear to be good.
Any suggestions on how to proceed with this simulation is welcome.
If it is a passive solar heater then Environmental Pressure boundaries are probably the way to go. If you are experiencing a vortex across the pressure boundary though you may need expand the extents of the fluid domain to move the pressure boundaries away from where your opening. This document offers a couple tips on how to deal with the vortex issues (GoEngineer - Flow Simulation: Vortex Across Pressure Boundary).