Inverse turbulence modeling of channel flow using continuous adjoint method
Abstract
In this thesis, a formal approach for inferring the functional forms of information that might be missing in Wilcox's k - o model for turbulent channel flow has been presented. Different terms of k - o transport equations have been modified by including a spatial parameter. The resulting inverse problem has been efficiently solved using continuous adjoint method to accurately predict mean velocity. In many cases, a simplifying assumption of a "frozen" eddy viscosity in the turbulence model has been made to arrive at the final set of adjoint equations. Good agreement between inferred solution and corresponding DNS data has been demonstrated, first, for plane channel flow and later, for channel flow with spanwise rotation where re-laminarization of fluid takes place. Finally, some parameters have been explored that seem to scale the corrections.
- Publication:
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Masters Thesis
- Pub Date:
- 2016
- Bibcode:
- 2016MsT..........8V
- Keywords:
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- Aerospace engineering;Mechanical engineering