EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Hu et al. 1999
Hu, B.X., Hassan, A.E. and Cushman, J.H. (1999). Eulerian solutions of O(s¿N) for the stochastic transport problem for conservative tracers coupled with O(sf4) solutions for the flow problem in an infinite domain. Water Resources Research 35: doi: 10.1029/1999WR900267. issn: 0043-1397.

An O(&sgr;&ngr;N) Eulerian stochastic theory <Cushman and Hu, 1997> for conservative transport is coupled with an O(&sgr;f4) Eulerian solution to the flow problem. The theory provides a self-consistent recursive solution to the closure problem associated with Eulerian methods. The stochastic concentration is given to arbitrary order in &sgr;&ngr;, the variance of fluctuating velocity. The balance law for mean concentration is not required in the analysis. Closed forms for mean concentration are given up to O(&sgr;&ngr;4). The mean concentration is transformed to wave-vector and frequency domain via fast Fourier transform to calculate numerically the mean concentration as well as its spatial moments. The results show that the first-order solution in &sgr;&ngr;2 is equivalent to the nonlocal theory of Deng et al. <1993>. Second-order corrections to flow and transport equations slightly decrease the second longitudinal moment but significantly increase the second transverse moment, which is consistent with Hsu et al.'s <1996> results. The influence of second-order corrections to skewness is not clear. The second longitudinal moment obtained from the second-order correction agrees with the Monte Carlo result, but second-order results for the second transverse moment and skewness significantly differ from those given in Monte Carlo simulations. Coupling the transport correction models with the velocity covariance generated through Monte Carlo simulation gives second transverse spatial moments that are very close to Monte Carlo simulations, which suggests that the correction to flow is more important than the correction to transport. The results also bring into question the accuracy of Monte Carlo simulations for flow. ¿ 1999 American Geophysical Union

BACKGROUND DATA FILES

Abstract

Keywords
Hydrology, Groundwater transport
Journal
Water Resources Research
http://www.agu.org/wrr/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit