AN ACCELERATED NODAL DISCONTINUOUS GALERKIN METHOD FOR THERMAL CONVECTION ON UNSTRUCTURED MESHES: FORMULATION AND VALIDATION

We present a GPU-accelerated method for large scale, coupled incompressible fluid flow and heat transfer problems. A high-order, nodal discontinuous Galerkin is utilized to discretize governing equations on unstructured triangular meshes. semi-implicit scheme with explicit treatment of the advective terms implicit split Stokes operators are used time discretization. The pressure system solved conjugate gradient together fully multigrid preconditioner. code built scalable libParanumal solver which library high-performance kernels high-order discretizations. Performance portability achieved by using open concurrent compute abstraction, OCCA. set numerical experiments including free mixed convection problems indicate that our approach experimentally reaches design order accuracy.