應用多重鬆弛時間晶格波茲曼法與大渦數值模擬分析方管內紊流流場

Analysis of Turbulent Flow in Square Duct by using Multiple-Relaxation Time Lattice Boltzmann Method and Large Eddy Simulation

劉士煌(Shih-Huang Liu)

指導教授 ： 林昭安

國立清華大學/工學院/動力機械工程學系/碩士(2013年)

摘要

In this paper, lattice Boltzmann method and large eddy simulation are adopted to
simulate the laminar and turbulent Poiseuille flow through square duct. The shear
or friction Reynolds number based on the duct width are 10 for the laminar
flow, whereas are 360 for the turbulent flow. We validate the governing equations
and the boundary conditions by simulating laminar Poiseuille duct flow. The results
of the laminar flow show good agreement compared with analytic solution. For the
turbulent Poiseuille square duct flow at Re = 360, our simulation is able to capture
the turbulence quantities by observing the mean streamwise velocity profile along
the wall bisector compared with the direct numerical simulation data and the law
of the wall. Then the simulation result of turbulence intensities and the Reynolds
stress variation along the wall bisector is also shown in present research.

關鍵字

晶格波茲曼法 ； 大渦數值模擬 ； 方管 ； 壓力驅動流 ； 紊流

並列摘要

無資料

並列關鍵字

lattice Boltzmann method ； large eddy simulation ； square duct ； Poiseuille flow ； turbulence

參考文獻

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