跳至主要内容

Numerical Study of Heat Transfer and Contaminant Transport in an Unsaturated Porous Soil

Read full paper at:
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50222#.VDIRI1fHRK0

Penetration of chemicals in the soil ground through irrigation water or rainfall induces important risks for the environment. These risks are badly known and may lead to direct contamination of the environment (atmosphere or ground water) or harmful effects on organisms living at ground level, indirectly affecting men. It is thus necessary to estimate these potential chemical risks on the environment. For that reason, the gradual change of these products (fertilizers, solutions, pollutants, ...) in the ground has been the subject of a lot of recent research works, based in particular on the study of non-saturated porous media in a theoretical, numerical or experimental way. Most of these works are incomplete and, in order to simplify the problem, they don’t take into accounts some process, which may be of prime importance under particular natural conditions. Complexity of such studies results from their multidisciplinary nature. In this communication, we study simultaneous transport of pollutant, the water that provides transport and the heat transfer in a 200 cm long cylindrical column full of sand taken as a non-saturated porous medium. We consider two kinds of conditions on the temperature at the column surface: the case of constant temperature and the case of sinusoidal temperature. We evaluate the influence of this temperature on the transfers. This study is purely numerical. We use the control volume method to determine hydrous, thermal and pollutant concentration profiles.
Cite this paper
Belghit, A. and Benyaich, M. (2014) Numerical Study of Heat Transfer and Contaminant Transport in an Unsaturated Porous Soil. Journal of Water Resource and Protection, 6, 1238-1247. doi: 10.4236/jwarp.2014.613113. 
 

[1] Gerson, H. and Mendes, N. (2006) Simultaneous Heat and Moisture Transfer in Soils Combined with Building Simulation. Energy and Buildings, 38, 303-314.
[2] Jury, W.A. (1982) Simulation of Solute Transport Using a Transfer Function Model. Water Resources Research, 18, 363-368.
[3] Liu, B.C., Liu, W. and Peng, S.W. (2005) Study of Heat and Moisture Transfer in Soil with a Dry Surface Layer. Intenational Journal of Heat and Mass Transfer, 48, 4579-4589.
[4] Viotti, P., Petrangeli Papini, M., Stracqualursi, N. and Gamba, C. (2005) Contaminant Transport in an Unsaturated Soil: Laboratory Test and Numerical Simulation Model as Procedure for Parameters Evaluation. Ecological Modeling, 183, 131-148.
http://dx.doi.org/10.1016/j.ecolmodel.2004.07.014
[5] Jendele, L. (2002) An Improved Numerical Solution of Multiphase Flow Analysis in Soil. Advances in Engineering Software, 33, 659-668.
http://dx.doi.org/10.1016/S0965-9978(02)00052-2
[6] El Hadji, B.D., et al. (2001) Modeling a Non-Conservative Solute Transfer in Unsaturated Porous Media. Earth and Planetary Sciences, 333, 129-132.
[7] Van Genuchten, M.T. and Wierenga, P.J. (1997) Mass Transfer Studies in Sorbing Porous Media: II. Experimental Evaluation with Tritium. Soil Science Society of America Journal, 41, 272-278.
http://dx.doi.org/10.2136/sssaj1977.03615995004100020022x
[8] Gaudet, J.P. (1978) Transfertd’eauet de solutesdans les sols non satures, mesures et simulation. Ph.D. Thesis, University of Grenoble, Grenoble.
[9] Lewis, J. and Sjostrom, J. (2010) Optimizing the Experimental Desing of Soil Columns in Saturated and Unsaturated Transport Experiments. Journal of Contaminant Hydrology, 115, 1-13.
http://dx.doi.org/10.1016/j.jconhyd.2010.04.001
[10] Ibnoussina, M., El Haroui, M. and Maslouhi, A. (2006) Experimentation and Modeling of the Leaching of Nitric Nitrogen in a Sanly Soil. Comptes Rendus Geoscience, 338, 787-794.
http://dx.doi.org/10.1016/j.crte.2006.07.002
[11] Patankar, S.V. (1978) Numerical Heat Transfer and Fluid Flow. McGraw-Hill, London.
[12] Philip, J. and De Vries, D.A. (1957) Moister Movement in Porous Materials under Temperature Gradients. Transactions, American Geophysical Union, 38, 2-22.
[13] Benyaich, M., Belghit, A., Gonzalez, A. and Claudet, B. (1998) Influence of Temperature on the Transport of Pollutant in Non-Saturated Soil. 3rd International Conference on Hydroscience and Engineering, Brandenburg University of Technology at Cottbus, ICHE, Cottbus/Berlin, 31 August-3 September 1998.
[14] Crausse, P. (1982) Etude fondamentale des transferts de chaleuretd'humidite. en milieu poreux non sature. P.h.D., I.N.P. Toulouse.
[15] Ouardi, C. and Zrikem, Z. (1997) Selection de sequencestypiques pour le climat de Marrakech: Application a l'habitat. 3eme Congres de Mecanique, Tome II-b, Tetouan, 673-679.
[16] Pickens, J.F., Gilham, R.W. and Cameron, D.R. (1979) Finite Element Analysis of the Transport of Water and Solutes in the Drained Soils. Journal of Hydrology, 40, 243-264.
http://dx.doi.org/10.1016/0022-1694(79)90033-7               eww141006lx
标签：

评论

发表评论

此博客中的热门博文

Does Immigration Promote the Investment of the Monopolistic Firm?

In the present paper, we examine the effect of increasing uncertainty of immigrants’ growth on the optimal timing of investment of a firm that has a monopolistic power over the labor market. It is revealed that when the uncertainty of immigrants’ growth is more than a threshold level, increasing uncertainty of immigrants’ growth accelerates the optimal timing of firms’ investment and enhances the economic growth, even if the uncertainty of immigrants’ growth is formulated by the geometric Brownian motion, which is in sharp contrast to the standard result that an increase in the uncertainty postpones the optimal timing. With an increase in the immigrants over the past ten years, workforces in the host countries have been growing significantly to the extent that the immigrants represent 70% of the increase in the workforce in Europe, and 47% in the United States as OECD indicates. In the present paper, we attempted to investigate the effect of increased uncertainty caused by the growi...
发表评论
阅读全文

Education Policy Implementation: A Mechanism for Enhancing Primary Education Development in Zanzibar

Education is one of the fundamental rights of individuals; therefore, the government of a country needs to develop and strengthen educational policy and quality as well as to ensure that everyone has equal access to basic education. The improvement of access and quality of education in the world is becoming as an essential factor in development, whereas the basic education (primary school), is acknowledged as a foundation of the higher educational development for every country. To fulfill this goal, governments introduce several policies and procedures; however, it requires some reforms and participation from the politician, policymakers, and other stakeholders to re-examine educational policy so that it can lead to multiplication and betterment of the reforms. Educational reforms actually focus on accountability. A positive educational development and reform is very challenging and needs more effort and strategy on how to use and utilize the resources effectively as such it can achie...
发表评论
阅读全文