SIMULIA TOSCA Fluid 2.4.3 Tosca Fluid is so far the only available system for topology optimization of channel flow problems. Starting from an initial design space, an optimized design of a flow channel is determined automatically by Tosca Fluid. With only one CFD solver run an optimized structure with e.g. significantly reduced pressure drop or homogeneous flow is derived. This allows for the first time an economic topology optimization of industrial large scale flow applicatons.