XV Bi-power law correlations for sediment transport in pressure driven channel flows
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چکیده
Direct numerical simulation (DNS) can be used to extract information implicit in the equations of fluid-particle motion. We have investigated the lift-off of a single particle and many particles in pressure driven flows by 2D DNS (N.A. Patankar, Huang, Ko & Joseph 2001a, Ko, N.A. Patankar & Joseph 2001, Joseph, & Ocando 2001, Choi & Joseph 2001, N.A. Patankar, Ko, Choi & Joseph 2001b). We show that the lift-off of single particles and many particles in horizontal flows follow laws of similarity, power laws, which may be obtained by plotting simulation data on log-log plots. Power laws emerge as in the case of Richardson-Zaki correlations for fluidization by drag. Power laws also emerge from the experimental data from STIM-LAB (Patankar, Joseph, Wang, Barree, Conway & Asadi 2002 and Wang, Joseph, Patankar, Conway & Barree 2002). These engineering correlations for lift-off can be used to predict proppant placement in hydraulic fracturing.
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تاریخ انتشار 2002