Finite element simulation of internal flows with heat transfer using a velocity correction approach |
| |
Authors: | B S Varaprasad Patnaik Y T K Gowda M S Ravisankar P A Aswatha Narayana K N Seetharamu |
| |
Affiliation: | (1) Department of Computational Science, National University of Singapore, 117543, Singapore;(2) Department of Mechanical Engineering, PES College of Engineering, 571 401 Mandya, India;(3) Department of Mechanical Engineering, Texas A&M University, 77843 College Station, TX, USA;(4) School of Mechanical Engineering, USM, 14300 Nibong Tebal, Malaysia |
| |
Abstract: | This paper enumerates finite-element based prediction of internal flow problems, with heat transfer. The present numerical
simulations employ a velocity correction algorithm, with a Galerkin weighted residual formulation. Two problems each in laminar
and turbulent flow regimes are investigated, by solving full Navier-Stokes equations. Flow over a backward-facing step is
studied with extensive validations. The robustness of the algorithm is demonstrated by solving a very complex problem viz.
a disk and doughnut baffled heat exchanger, which has several obstructions in its flow path. The effect of wall conductivity
in turbulent heat transfer is also studied by performing a conjugate analysis. Temporal evolution of flow in a channel due
to circular, square and elliptic obstructions is investigated, to simulate the vortex dynamics. Flow past an in-line tube
bank of a heat exchanger shell is numerically studied. Resulting heat and fluid flow patterns are analysed. Important design
parameters of interest such as the Nusselt number, Strouhal number, skin friction coefficient, pressure drop etc. are obtained.
It is successfully demonstrated that the velocity correction approach with a Galerkin weighted residual formulation is able
to effectively simulate a wide range of fluid flow features. |
| |
Keywords: | Velocity correction method finite element simulation turbulent flows internal flows bluff body flows heat exchangers |
本文献已被 SpringerLink 等数据库收录! |
|