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Flow field predictions in a model heat exchanger (1988)

Theodossiou, V. M. ; Sousa, A. C. M. ; Carlucci, L. N.

Springer

Computational mechanics 3 (1988), S. 419-428

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ISSN: 1432-0924

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau

Notizen: Abstract A numerical study of the two-dimensional isothermal steady flow distribution of an incompressible fluid in the shell side of an experimental heat exchanger is described. Computations are performed with and without tubes present in the model, for Reynolds numbers up to 10,000. Baffles and tube bundles are modelled by incorporating the “porous medium” concept into the governing equations. The resulting equations described in primitive variables are solved using a semi-implicit predictor-corrector type scheme. A Multi-Grid technique is employed to solve the linearized pressure correction equation which links momentum and continuity equations. Predictions with the proposed scheme indicate good qualitative agreement when compared with experimental measurements.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00301142

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Digitale Medien

The effects of symmetric/asymmetric boundary conditions on the flow of an internally heated fluid (1986)

Carlucci, L. N. ; Cheung, I.

New York, NY [u.a.] : Wiley-Blackwell

Numerical Methods for Partial Differential Equations 2 (1986), S. 47-61

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ISSN: 0749-159X

Schlagwort(e): Mathematics and Statistics ; Numerical Methods

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Mathematik

Notizen: The two-dimensional flow of an internally heated fluid in a circular vessel has been investigated by using a finite-control-volume numerical model. It has been found that, when symmetry constraints are imposed along the vertical midplane of the vessel, two distinct flow patterns can he predicted for the same operating conditions, a jet-momentum-dominated pattern and buoyancy-dominated pattern. These patterns occur in an operating region where momentum and buoyancy forces are of comparable magnitude. However, when the symmetry constraints are removed and the full vessel cross section is modeled, only the buoyancy-dominated pattern is observed. Results for the two cases are described and possible reasons for the differences in behavior are discussed.

Zusätzliches Material: 16 Ill.