A parametric, hybrid reduced order method based on the Proper Orthogonal Decomposition with both Galerkin projection and interpolation based on Radial Basis Functions method is presented. This method is tested on a case of turbulent non-isothermal mixing in a T-junction pipe, a common flow arrangement found in nuclear reactor cooling systems. The reduced order model is derived from the 3D unsteady, incompressible Navier-Stokes equations weakly coupled with the energy equation. For high Reynolds numbers, the eddy viscosity and eddy diffusivity are incorporated into the Reduced Order Model with a Proper Orthogonal Decomposition (nested and standard) with Interpolation (PODI), where the interpolation is performed using Radial Basis Functions. The reduced order solver, obtained using a k−ω SST Unsteady Reynolds Averaged Navier-Stokes full order model, is tested against the full order solver in a 3D T-junction pipe with parameterised velocity inlet boundary conditions.
A hybrid reduced order method for modelling turbulent heat transfer problems / Georgaka, S.; Stabile, G.; Star, K.; Rozza, G.; Bluck, M. J.. - In: COMPUTERS & FLUIDS. - ISSN 0045-7930. - 208(2020), pp. 1-15. [10.1016/j.compfluid.2020.104615]
|Titolo:||A hybrid reduced order method for modelling turbulent heat transfer problems|
|Autori:||Georgaka, S.; Stabile, G.; Star, K.; Rozza, G.; Bluck, M. J.|
|Data di pubblicazione:||2020|
|Numero di Articolo:||104615|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.compfluid.2020.104615|
|Appare nelle tipologie:||1.1 Journal article|