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Study of high Reynolds number pipe flows with porous inserts
Pereira, José Carlos F.; Malico, Isabel; Hayashi, Thamy C.; Raposo, Jorge M. F.This paper reports experiments and calculations for the flow at the inlet and exit of a ceramic foam located in a straight pipe and in a pipe with a 1:4 sudden expansion. For the latter, the foam, with thickness to diameter ratio between 0.15 and 0.60, was located at different distances from the sudden expansion wall. Three different pore sizes (10, 20 and 60 ppi) were investigated for pore Reynolds numbers in ...
Experimental and numerical characterization of the transverse dispersion at the...
Pereira, José Carlos F.; Malico, Isabel; Hayashi, Thamy C.; Raposo, Jorge M. F.The paper theoretically and numerically describes and experimentally studies transverse dispersion of a passive tracer in highly porous ceramic foams of different pore sizes. The pore Reynolds numbers range from 10 to 300. Digital images of the dispersion patterns were recorded and an approximate transverse dispersion coefficient was determined. Numerical solutions of the steady fluid flow and scalar concentrat...
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