10 Million DOF CFD Solutions on a Laptop
In our News of July 15, 2006, we illustrated
the performance of our algebraic multigrid solver in CFD. However, since then, we have significantly
improved the solver for large industrial CFD problems.
For example, the turbulence kepsilon exhaust manifold model (shown in the above figure), in which the steadystate
fluid flow is solved with
about 1.5 million 3D elements, is now solved in only 53 minutes clock time, using only 2 GB memory, on a
single processor PC.
The robustness of the solution procedure has also been improved so that the default solver parameters
(i.e., relaxation factors and convergence tolerances) will work for most problems.
To further illustrate the efficiency of our solver, the graphs below show the solution times (clock
times) and memory usage when solving the steadystate manifold and turnaround duct problems, previously described
in our September 28, 2004, and July 15, 2006 News. For the graphs below, a single processor 3.2GHz PC costing
under $2,000 was used. These solution times can be reduced by using a multiprocessor machine.
Of course, the overall efficiency of our CFD solutions will also be of much benefit in the solution of complex FSI
problems using ADINA.
