Solving Coupled pde in comsol

Question

Does anyone know which module in comsol should I use to solve below equations?

$partial_t u1 = -a1 \div ((cos(s), sin(s)) u1) + a2 \div (u1 \grad (u2) )+ a3 \partial_s ((-sin(s), cos(s)) \cdot \nabla c u1) + a4 \nabla^2 u1+a5 \nabla^2 u1+a6 \partial_s^2 u1$

$\partial_t u2= a5 \nabla^2 u2 - k u2 u1$

Answer 1

COMSOL Multiphysics base package can solve these kinds of problems. There are many examples and tutorials on equation based modeling in COMSOL. Equation based modeling in COMSOL