Zobrazeno 1 - 10
of 17
pro vyhledávání: '"D. K. Babu"'
Autor:
D. K. Babu, A. S. Odeh
Publikováno v:
SPE Formation Evaluation. 5:7-15
Summary Four flow periods may occur during the transient behavior of a horizontal well. Drawdown and buildup equations describing the flow behavior of each of the four flow periods are given. Methods for analyzing data obtained from testing the well
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26449a942c5c1bf936c6b1f51e2c9ae8
https://doi.org/10.2118/18802-pa
https://doi.org/10.2118/18802-pa
Autor:
K. KRISHNANKUTTY, D. K. BABU
Department of Chemistry, University of Calicut, Kerala-673 635 Manuscript received 17 May 1994,accepted 25 November 1994 A new series of heterocyclic azo compounds have been synthesised by coupling diazotised 2-aminothiazol with 1,3-dicarbonyl compou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d612bb22e90148651bf82b690b78883
Autor:
D. K. Babu
Publikováno v:
Soil Science Society of America Journal. 44:915-921
The paper investigates water movement under saturated-unsaturated flow conditions. The flows result from a vertically placed line source that injects water at a constant rate into radial directions in space. Soil water diffusivity is assumed to vary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4987a24da06a779c12412264739a0471
https://doi.org/10.2136/sssaj1980.03615995004400050007x
https://doi.org/10.2136/sssaj1980.03615995004400050007x
Autor:
D. K. Babu
Publikováno v:
Water Resources Research. 12:1019-1024
Simple perturbation methods continue to yield good results in the solution of the problem of vertical infiltration of water into unsaturated soils. The initial approximation is valid for all times and gives useful information about important flow cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::944f63bdfc6871ee091dd22b21f6ffbe
https://doi.org/10.1029/wr012i005p01019
https://doi.org/10.1029/wr012i005p01019
Autor:
M.Th. Van Genuchten, D. K. Babu
Publikováno v:
Journal of Hydrology. 48:269-280
Babu, D.K. and Van Genuchten, M.Th., 1980. A perturbation solution of the nonlinear Boussinesq equation: the case of constant injection into a radial aquifer. J. Hydrol., 48: 269--280. A generalized version of the Boussinesq equation is solved, using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c25d3e987352d76d8099932dadb73aac
https://doi.org/10.1016/0022-1694(80)90119-5
https://doi.org/10.1016/0022-1694(80)90119-5
Autor:
George F. Pinder, D. K. Babu
Publikováno v:
International Journal for Numerical Methods in Engineering. 20:1153-1163
Exact and approximate analytical expressions can be derived for integrals arising in finite element methods, employing isoparametric linear quadrilaterals in two space dimensions with bilinear basis functions. The formulae associated with rectangular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fa2c762e8cb95ac89874f91e318d378
https://doi.org/10.1002/nme.1620200613
https://doi.org/10.1002/nme.1620200613
Autor:
D. K. Babu
Publikováno v:
Water Resources Research. 12:1013-1018
Perturbation methods are employed to analyze the horizontal absorption of moisture in unsaturated soils. The present study applies to absorption under the general diffusivity function, subject to constant boundary concentration. The concept of the we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f99858cbaa6aabd7f56f7aaabde1ab6f
https://doi.org/10.1029/wr012i005p01013
https://doi.org/10.1029/wr012i005p01013
Autor:
D. K. Babu, M. Th. van Genuchten
Publikováno v:
Quarterly of Applied Mathematics. 37:11-21
The one-dimensional nonlinear diffusion equation is solved by a perturbation technique. It is assumed that the diffusivity varies as a nonnegative power of the concentration, while the concentration at the supply surface varies as another power of ti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd5cef63649f6d4d5459c0a016713e7b
https://doi.org/10.1090/qam/530666
https://doi.org/10.1090/qam/530666
Autor:
D. K. Babu
Publikováno v:
Water Resources Research. 12:89-93
Simple perturbation methods are employed to analyze the horizontal absorption of moisture in unsaturated soils. The special case treated assumes the diffusivity to be an exponential function of the concentration and the concentration at the boundarie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d08238a50d7f45ed41d73808e5b00ca5
https://doi.org/10.1029/wr012i001p00089
https://doi.org/10.1029/wr012i001p00089
Autor:
D. E. Dougherty, D. K. Babu
Publikováno v:
Water Resources Research. 20:1116-1122
Analysis of flow in a fractured porous reservoir forms the basis for investigations of chemical and energy transport in such media. Numerical models are often employed to analyze these geohydrologic systems. In this paper a well hydraulics problem is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af0a0ba18f268f9e37079fccbff3717c
https://doi.org/10.1029/wr020i008p01116
https://doi.org/10.1029/wr020i008p01116