Rao, Sanjeev K (2000) An Oseen-type model for swirling internal separated flows. Journal of Engineering Mathematics, 38 (2). pp. 119-140. ISSN 0022-0833Full text not available from this repository.
The viscous, laminar, separated flow downstream of a sudden expansion in a pipe is studied. The flow is modeled by an Oseen-type equation, but with the additional feature that the nonlinearity in the swirl is retained. Exact solutions are obtained for a high-Reynolds-number limit and for arbitrary Reynolds number by use of an eigenfunction-expansion procedure, in the presence of swirl. This leads to a non-standard eigenvalue problem. When the swirl is sufficiently large, a central recirculating region is observed. The effect of the pressure gradients on the velocity profiles and the central recirculating eddy is discussed. The low-Reynolds-number solutions go over smoothly to the large Reynolds number solution as the Reynolds number increases. Good agreement is obtained with the numerically computed value of the reattachment length.
|Item Type:||Journal Article|
|Uncontrolled Keywords:||Eigenvalues and eigenfunctions;Flow separation;Laminar flow;Navier-Stokes equations;Pipe flow;Rotational flow;Swirling flow;Oseen-type model;Swirling internal separated flows;Viscous laminar separated flow;Downstream flow;Sudden expansion;Pipe;Oseen-type equation;Swirl nonlinearity|
|Subjects:||ENGINEERING > Fluid Mechanics and Thermodynamics|
|Division/Department:||Computational and Theoretical Fluid Dynamics Division|
|Depositing User:||MS Jayashree S|
|Date Deposited:||26 Apr 2007|
|Last Modified:||24 May 2010 09:55|
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