Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 342652
Title A simple model for obstructed two-dimensional turbulent channel flow
Author(s) Dirkse, M.H.; Loon, W.K.P. van; Stigter, J.D.
Event EUROTHERM Seminar 82 Numerical Heat Transfer 2005, 2005-09-13/2005-09-16
Department(s) Systems and Control Group
Publication type Contribution in proceedings
Publication year 2005
Abstract We have investigated obstructed two-dimensional turbulent channel flow. The objective is to provide a simple building block for design models and to gain physical insight in this type of flow. We have designed a simple model with some unknown parameters to be calibrated against a CFD model. The model divides the domain between an area of main flow and recirculation areas. The model approximates these areas by polygonal shapes. The locations of the vertices of these polygons are the parameters in the model. This way, we can evaluate the simple model using the Schwarz-Christoffel integral. As a consequence, the model can be evaluated much more quickly than CFD models. The main flow is modeled to be irrotational. The recirculation area behind the obstacle is modeled as a stretched monopolar vortex and this requires 4 extra parameters. The other areas of separated flow are simply modeled to be stationary. By calibrating the simple model we have demonstrated that this physical description works reasonably well. Using only 9 parameters, the simple model reaches an error of 22\\% of the inflow velocity.
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