대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제18권7호
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- Pages.1866-1872
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- 1994
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- 1225-5963(pISSN)
DOI QR Code
높은 레이놀즈수에서의 난류 장애물유동의 Large-Eddy-Simulation
Large-Eddy Simulation of a Turbulent Obstacle Flow at a High Reynolds Number
초록
Turbulent flow in a channel with a square rib periodically mounted on one wall is studied by large-eddy simulation(LES). An efficient 3D Navier-Stokes solver has been written for this geometry using a fractional step method and a multi-grid technique. The Reynolds number considered is 82, 000 based on the mean velocity above the obstacle height. Near-wall turbulence is approximated by a wall-layer model based on the turbulence intensity at the grid point nearest a solid wall. The results show a good qualitative agreement with experiments currently available for a single rib, indicating that LES can be a useful tool in simulating complex turbulent flows.
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