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- W2368583524 abstract "Based on the analytical solution of 2-D advection-diffusion equation,the analytical method for calculating conservative pollutant concentration distribution in straight streams and corresponding formula for dimensionless concentration distribution,with boundary reflection being taken into account,is deduced.The modified Peclet number(P_w) comprehensively reflecting the ratio of longitudinal advection effect to transverse diffusion effect is defined.The regression relationship between boundary reflection times and P_w for relative concentration equal to 10~(-6) is obtained by numerical calculation.Under the condition of P_w≥7.5 and neglecting the longitudinal diffusion,the assumption that the pollutant concentration distribution discharged from the bank side is similar to that of the half side discharged from the river center is demonstrated.Furthermore,the relative concentration distribution of pollutant and the dimensionless transverse coordinates of the characteristic concentration points at the bank exhausting pollutant and its opposite bank,as well as the relationship between P_w and the dimensionless distance for pollutant full-section uniformly mixed are given.It is concluded that the P_w can be used as the discrimination of the simplification of advection-diffusion equation and the conditions of simplification,in consideration of boundary reflection,can be deduced." @default.
- W2368583524 created "2016-06-24" @default.
- W2368583524 creator A5075501767 @default.
- W2368583524 date "2009-01-01" @default.
- W2368583524 modified "2023-09-23" @default.
- W2368583524 title "Analytical calculation of the two-dimensional advection-diffusion equation for pollutant mixing in river and conditions for simplification I. Wide straight river without boundary reflection" @default.
- W2368583524 hasPublicationYear "2009" @default.
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