Computational Fluid Dynamics, Heat Transfer, Combustion, Ground water flow and transport, Shallow water flow and transport. Consulting services. Software products in CFD: ANSWER(r): General Purpose Navier-Stokes solver with capability for reacting flow and transport PORFLOW(r): Porous media flow. Solves the Darcy equations along with thermal and transport equations. TIDAL(r): Solves the shallow water equations along with transport.