Role of Flow-Consistent Grid in CFO

Kumar, Anand (1998) Role of Flow-Consistent Grid in CFO. Technical Report. C-MMACS/ National Aerospace Laboratories, Bangalore, India.

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Abstract

Computational grid can play a crucial role in accurate CFD simulations. This is shown here through the example of leading-edge vortex flow . Conventional grids for flow over sharp-edged delta wings do not resolve the near-apex flow due to dissimilar length scales of the flow and the grid . This in turn can affect the simulation of many vortex related phenomena . A grid that is consistent with the special nature of the flow is required to overcome13; the difficulty . The Euler simulation of transonic vortex is considered where employment of a flow-consistent grid is shown to give a well-resolved vortex with cross-flow shock and also the shock-induced secondary vortex, right from the apex . On the other hand, when a conventional grid is employed these features are absent in the near-apex flow, and the subsequent flow development is seriously affected. Euler simulation of subsonic vortex breakdown has also been considered . In this case the employment of a flow-consistent grid has led to unravel the fine details of the breakdown process .

Item Type:	Monograph (Technical Report)
Uncontrolled Keywords:	Flow-consistent grid in CFD
Subjects:	MATHEMATICAL AND COMPUTER SCIENCES > Mathematical and Computer Scienes(General)
Depositing User:	Mr. N A
Date Deposited:	16 Jun 2006
Last Modified:	24 May 2010 04:14
URI:	http://nal-ir.nal.res.in/id/eprint/1882

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