A MONOLITHIC METHOD FOR SIMULATING CONJUGATE HEAT TRANSFER VIA QUASI-IMPLICIT SCHEME OF CHARACTERISTIC-BASED SPLIT FINITE ELEMENT1)
Liu Yu*, Deng Jiayu*, Wang Chengen,*,2), Su Hongxin†*School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China †School of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116024, Liaoning, China
Abstract Conjugate heat transfer is widely present in the fields of science and engineering. With the development of computing power, the accurate and effective numerical simulation of conjugate heat transfer has become a major challenge in scientific research and engineering design. The method of numerical simulation of conjugate heat transfer can be divided into two main categories: partitioned method and monolithic method. Each of these methods has its pros and cons. We have developed a monolithic method for simulating the conjugate heat transfer between solid and incompressible laminar flows with the finite element method. Heat conduction in solid is solved by the standard Galerkin finite element method. The flow solution adopts the characteristic-based split finite element method (CBS). This method is an important finite element method for solving flow problems, and equal-order finite elements can be used. Compared with semi-implicit and CBS-AC schemes, the quasi-implicit scheme of this method can adopt a larger time-step. The stability of the quasi-implicit scheme is improved by distinguishing the time step in the stabilization item from the global time step. Based on the quasi-implicit scheme of the improved CBS method, a monolithic method of conjugate heat transfer numerical simulation has been developed. In this way, the fluid part and solid part of the computational domain can be divided into finite element meshes as a whole, and the equal-order interpolation functions can be used for all variables, thus facilitating the realization of the program. The accuracy of this method is validated by simulating the benchmark problems. The effect of the time step for the solid domain on the convergence of steady conjugate heat transfer simulation has also been studied. Keywords:conjugate heat transfer;monolithic;incompressible flow;finite element;numerical simulation
PDF (3578KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 刘瑜, 邓家钰, 王成恩, 苏红星. 基于特征分裂有限元准隐格式的共轭传热整体耦合数值模拟方法1). 力学学报[J], 2021, 53(4): 986-997 DOI:10.6052/0459-1879-20-299 Liu Yu, Deng Jiayu, Wang Chengen, Su Hongxin. A MONOLITHIC METHOD FOR SIMULATING CONJUGATE HEAT TRANSFER VIA QUASI-IMPLICIT SCHEME OF CHARACTERISTIC-BASED SPLIT FINITE ELEMENT1). Chinese Journal of Theoretical and Applied Mechanics[J], 2021, 53(4): 986-997 DOI:10.6052/0459-1879-20-299
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