A computationally efficient reduced order model to generate multi-parameter fluid-thermal databases

作者：Bache E; Alonso D; Velazquez A^*; Vega J M

来源：International Journal of Thermal Sciences, 2012, 52: 145-153.

DOI：10.1016/j.ijthermalsci.2011.08.022

• Reduced order model
• Database generation
• Backward-facing step
• Non-isothermal flow
• Gradient-like minimization methods

A reduced order model (ROM) is proposed to generate multi-parameter databases of some fluid-thermal problems, using a combination of proper orthogonal decomposition, a gradient-like method, and a continuation method. The resulting ROM greatly reduces the CPU time required by slower methods based on genetic algorithm formulations. As a byproduct, the number of required snapshots is also reduced, which yields an additional improvement of the computational efficiency. The work presented in this article aims to facilitate the use of ROMs in industrial environments, in which time is a very important asset. The methodology is illustrated with the non-isothermal flow past a backward-facing step in the laminar regime, which is a representative problem, related to the engineering design of micro-heat sinks.

• 出版日期2012-2