The G3D::Flow Solver Framework

G3D::Flow is a massively parallel flow solver for simulation of compressible and incompressible flows developed at the Division of Fluid Dynamics at the Department of Applied Mechanics at Chalmers University of Technology. The solver is written in C++ and uses the distributed data types and solvers available in the PETSc library. The incompressible flow solver available in the G3D::Flow framework has been developed with financing from SNIC.

The compressible solver in G3D::Flow is based on explicit time-marching using three-stage Runge-Kutta. The convective scheme is based on user-defined coefficients and with the four cell wide stencil it is possible to obtain a low-dissipation third-order accurate scheme. Diffusive fluxes are evaluated using second-order centered difference. The solver can be used for unsteady and steady-state simulations. The solver can be started in full 3D, 2D, 2D axisymmetric, or quasi 1D mode. It supports simulation of inviscid and viscous flows and there are number of implemented turbulence models such as \(k-\varepsilon\), \(k-\omega\), \(k-\omega\) SST, a number of DES models, and Smagorinsky LES.

The Incompressible solver is based on the same numerics as the compressible solver and can be used for simulation of unsteady flows using a fraction-step solver based on PETSc Krylov solvers and preconditioners.

About the workshop

A two-day course on the usage and development of the G3D::Flow code will be organized by C3SE as part of the SNIC training program. The course dates are set to 2016-10-18 - 2016-10-19 and the registration is open until 2016-10-11. The course schedule is given below.

Schedule

Contact Information

Niklas Andersson
Chalmers University of Technology
Department of Applied Mechanics
SE-412 96 Göteborg, Sweden
E-mail