MULTIPLE SCALE SIMULATION FOR TRANSITIONAL AND TURBULENT FLOW

                         Chaoqun Liu and Zhining Liu
                  Front Range Scientific Computations, Inc.
                            Denver, CO 80217-3364

                                   Abstract


A new concept, multiple scale simulation (MSS), is initiated in this work.
The basic idea is that the flow is decomposed into several component groups
according to spatial and temporal length scales.  Each group has its own
subdomain, governing system, mesh size, and discretization method.  The
simulation is then performed group wise.  This approach has been successfully
applied in combination with our new intergrid dissipation technique for
simulation of transitional and turbulent flow in 3-D boundary lay ers, and it
is feasible for 3-D airfoils and other more complex configurations.  MSS
should prove to ameliorate the scale problems associated with conventional
direct numerical simulation and is, therefore, a potential tool to solve the
problem associated with the numerical simulation of finite-rate turbulent
combustion with detail chemistry