@article {2020,
	title = {A hybrid reduced order method for modelling turbulent heat transfer problems},
	journal = {Computers \& Fluids},
	volume = {208},
	year = {2020},
	pages = {104615},
	abstract = {<p>A parametric, hybrid reduced order model approach based on the Proper Orthogonal Decomposition with both Galerkin projection and interpolation based on Radial Basis Functions method is presented. This method is tested against a case of turbulent non-isothermal mixing in a T-junction pipe, a common ow 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 URANS full order model, is tested against the full order solver in a 3D T-junction pipe with parametric velocity inlet boundary conditions.</p>},
	doi = {10.1016/j.compfluid.2020.104615},
	url = {https://arxiv.org/abs/1906.08725},
	author = {Sokratia Georgaka and Giovanni Stabile and Kelbij Star and Gianluigi Rozza and Michael J. Bluck}
}
@article {2019,
	title = {Parametric POD-Galerkin Model Order Reduction for Unsteady-State Heat Transfer Problems},
	journal = {Communications in Computational Physics},
	volume = {27},
	year = {2019},
	pages = {1{\textendash}32},
	abstract = {<p>A parametric reduced order model based on proper orthogonal decom- position with Galerkin projection has been developed and applied for the modeling of heat transport in T-junction pipes which are widely found in nuclear power plants. Thermal mixing of different temperature coolants in T-junction pipes leads to tem- perature fluctuations and this could potentially cause thermal fatigue in the pipe walls. The novelty of this paper is the development of a parametric ROM considering the three dimensional, incompressible, unsteady Navier-Stokes equations coupled with the heat transport equation in a finite volume approximation. Two different paramet- ric cases are presented in this paper: parametrization of the inlet temperatures and parametrization of the kinematic viscosity. Different training spaces are considered and the results are compared against the full order model.</p>},
	issn = {1991-7120},
	doi = {10.4208/cicp.OA-2018-0207},
	url = {https://arxiv.org/abs/1808.05175},
	author = {Sokratia Georgaka and Giovanni Stabile and Gianluigi Rozza and Michael J. Bluck}
}
