Hello, I'm testing a simple case only with convection term, no diffusion term, no source term. I used exponential, hybrid and Upwind schemes to describe the convection term. But, these all failed to solve this case. It seems only VanLeer scheme provides a more reliable result. I just want to know more details in VanLeer scheme which is not included in the FiPy User's Guide. Another question is: can I describe the convection term as convTerm=(convCoeff*var.getArithmeticFaceValue()).getDivergence() convCoeff is a vector. What's the difference if I define the convection term by myself without using the (default) scheme. Thank you so much in advance for any help.
Kundar ps. I used 2D model with periodic boundary.
