TY - JOUR
T1 - Stationary and oscillatory flow through coarse porous media
AU - Van Gent, M. R.A.
PY - 1993
Y1 - 1993
N2 - The coefficients from the extended Forchheimer equation, which is supposed to describe non-stationary porous flow, were determined. It appeared that for oscillatory flow the turbulent resistance is larger than under stationary flow conditions. This additional resistance is dependent on the flow-field and expressed by the Keulegan-Carpenter number. The contribution of the inertial resistance is also dependent on the flow field. Its contribution to the total resistance was rather limited. The influence of the non-stationary flow conditions have been implemented in the expressions for the turbulent resistance and the inertial resistance. Comparisons of the results from the stationary flow tests with other measurements show that the results correspond reasonably well. This is not the case for existing expressions for stationary flow. The existing formulae under-predict the a-values while they over-predict the b-values. -from Author
AB - The coefficients from the extended Forchheimer equation, which is supposed to describe non-stationary porous flow, were determined. It appeared that for oscillatory flow the turbulent resistance is larger than under stationary flow conditions. This additional resistance is dependent on the flow-field and expressed by the Keulegan-Carpenter number. The contribution of the inertial resistance is also dependent on the flow field. Its contribution to the total resistance was rather limited. The influence of the non-stationary flow conditions have been implemented in the expressions for the turbulent resistance and the inertial resistance. Comparisons of the results from the stationary flow tests with other measurements show that the results correspond reasonably well. This is not the case for existing expressions for stationary flow. The existing formulae under-predict the a-values while they over-predict the b-values. -from Author
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UR - https://www.researchgate.net/publication/27349506_Stationary_and_oscillatory_flow_through_coarse_porous_media
M3 - Article
AN - SCOPUS:0027805586
VL - 93-9
JO - Communications on Hydraulics, Delft University of Technology, Department of Civil Engineering Report
JF - Communications on Hydraulics, Delft University of Technology, Department of Civil Engineering Report
ER -