2026-04-17T14:20:34Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/220342025-07-17T09:08:06Zcom_2072_1033col_2072_452950

Blending regularization and large-eddy simulation. From homogeneous isotropic turbulence to wind farm boundary layers Folch Flórez, David Trias Miquel, Francesc Xavier Gorobets, Andrei Oliva Llena, Asensio Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids Fluid mechanics Turbulence Mecànica de fluids Turbulència The incompressible Navier-Stokes equations form an excellent mathematical model for turbulent flows. However, direct simulations at high Reynolds numbers are not feasible because the convective term produces far too many relevant scales of motion. Therefore, in the foreseeable future numerical simulations of turbulent flows will have to resort to models of the small scales. Large-eddy simulation (LES) and regularization models are examples thereof. In the present work, we propose to combine both approaches. Restoring the Galilean invariance of the regularization method results into an additional hyperviscosity term. This approach provides a natural blending between regularization and LES. The performance of these recent improvements will be assessed through application to homogeneous isotropic turbulence, a turbulent channel flow and a wind-farm turbulent boundary layer. Peer Reviewed Postprint (published version) 2013 Conference lecture Folch, D. [et al.]. Blending regularization and large-eddy simulation. From homogeneous isotropic turbulence to wind farm boundary layers. A: European Turbulence Conference. "14th European Turbulence Conference : Accepted talks proceedings". Lyon: 2013. https://hdl.handle.net/2117/22034 eng Restricted access - publisher's policy application/pdf