Flow through fractal-like branching networks is investigated using a three-dimensional computational fluid dynamics approach. Results are used to assess the validity of, and provide insight for improving, assumptions imposed in a previously developed one-dimensional model. Assumptions in the one-dimensional model include (1) reinitiating boundary layers following each bifurcation, (2) constant thermophysical fluid properties, and (3) negligible minor losses at the bifurcations. No changes to the redevelopment of hydrodynamic boundary layers following a bifurcation are recommended. It is concluded that temperature varying fluid properties should be incorporated in the one-dimensional model to improve its predictive capabilities, especially at higher imposed heat fluxes. Finally, a local pressure recovery at each bifurcation results from an increase in flow area. Ultimately, this results in a lower total pressure drop and should be incorporated in the one-dimensional model.
Fluid Flow Through Microscale Fractal-Like Branching Channel Networks
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division Jan. 22, 2003; revised manuscript received June 6, 2003. Associate Editor: K. D. Squires.
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Alharbi, A. Y., Pence, D. V., and Cullion, R. N. (January 12, 2004). "Fluid Flow Through Microscale Fractal-Like Branching Channel Networks ." ASME. J. Fluids Eng. November 2003; 125(6): 1051–1057. https://doi.org/10.1115/1.1625684
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