Geo-Congress 2020
Numerical Analysis of Variation of Saturation and Moisture Transport at the Vicinity of a Heat Source
Publication: Geo-Congress 2020: Geo-Systems, Sustainability, Geoenvironmental Engineering, and Unsaturated Soil Mechanics (GSP 319)
ABSTRACT
Heat and mass transfers in unsaturated porous media have not been thoroughly investigated in previous studies as most of them assumed that conduction is the only heat transfer mechanism in soil, neglecting convection and phase change while considering constant soil thermal properties. Thermal gradient from a heat source reduces moisture content of the surrounding soil. The dry-out process along with coupled heat and mass transfer can directly affect thermo-hydro-mechanical behavior of soil which has not been previously investigated in the literature. The aim of this study is to evaluate the effect of coupled heat and mass transfer in unsaturated soil and assess the moisture content variation in proximity of a heat source. Hence, a non-equilibrium multiphase flow model is adopted to numerically simulate heat and mass transfer. Different scenarios are defined by changing initial moisture content and heat flux. Results show significant dependency of soil moisture variation to initial conditions.
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REFERENCES
Bear, J., Bensabat, J., and Nir, A. (1991). "Heat and mass transfer in unsaturated porous media at a hot boundary: I. One-dimensional analytical model." Transport in porous media, 6(3), 281-298.
Benet, J.-C., Lozano, A.-L., Cherblanc, F., and Cousin, B. (2009). "Phase change of water in a hygroscopic porous medium. Phenomenological relation and experimental analysis for water in soil." Journal of Non-Equilibrium Thermodynamics, 34(2), 133-153.
Bixler, N. E. (1985). NORIA: A finite element computer program for analyzing water, vapor, air and energy transport in porous media, Sandia National Laboratories Albuquerque, NM.
Campbell, G., Jungbauer Jr, J., Bidlake, W., and Hungerford, R. (1994). "Predicting the effect of temperature on soil thermal conductivity." Soil science, 158(5), 307-313.
Cass, A., Campbell, G., and Jones, T. (1984). "Enhancement of Thermal Water Vapor Diffusion in Soil 1." Soil Science Society of America Journal, 48(1), 25-32.
Ghasemi-Fare, O. and Basu, P. (2013). “A practical heat transfer model for geothermal piles”, Energy and Buildings, 66, 470-479.
Ghasemi-Fare, O. and Basu, P. (2016). “Predictive assessment of heat exchange performance of geothermal energy piles”, Renewable Energy, 86, 1178-1196.
Ghasemi-Fare, O. and Basu, P. (2018). “Influence of ground saturation and thermal boundary condition on energy harvesting using geothermal piles”, Energy and Buildings, 165, 340-351.
Ghasemi-Fare, O. and Basu, P. (2019). “Thermal performance of heat exchanger piles in the presence of temperature-induced buoyant pore fluid flow,” Computers and Geotechnics, 116, 103211.
Grant, S. A., and Salehzadeh, A. (1996). "Calculation of temperature effects on wetting coefficients of porous solids and their capillary pressure functions." Water Resources Research, 32(2), 261-270.
Gurr, C., Marshall, T., and Hutton, J. (1952). "Movement of water in soil due to a temperature gradient." Soil Science, 74(5), 335-346.
Hillel, D. (2013). Fundamentals of soil physics, Academic press.
Hruška, M., Clauser, C., and De Doncker, R. W. (2018). "The Effect of Drying around Power Cables on the Vadose Zone Temperature." Vadose Zone Journal, 17(1).
Joshaghani, M., Ghavami, M., Ghasemi-Fare, O. (2018). “Experimental investigation on the effects of temperature on physical properties of sandy soils”, IFCEE, ASCE, March 5-10.
Joshaghani, M., Ghasemi-Fare, O. (2019). “A Study on thermal consolidation of fine grained soils using modified triaxial cell”, Geo-congress, ASCE, March 24-27.
Khosravi, A., Rahimi, M., Gheibi, A., and Mahdi Shahrabi, M. (2017). "Impact of plastic compression on the small strain shear modulus of unsaturated silts." International Journal of Geomechanics, 18(2), 04017138.
Khosravi, A., Rahimi, M., Shahbazan, P., Pak, A., and Gheibi, A. "Characterizing the variation of small strain shear modulus for silt and sand during hydraulic hysteresis." Proc., E3S Web of Conferences, EDP Sciences, 14018.
Lide, D. R. (2004). CRC handbook of chemistry and physics, CRC press.
Millington, R., and Quirk, J. (1961). "Permeability of porous solids." Transactions of the Faraday Society, 57, 1200-1207.
Moradi, A. (2016). "Experimental and numerical analysis of heat transfer in unsaturated soil with an application to soil borehole thermal energy storage (SBTES) systems." Colorado School of Mines. Arthur Lakes Library.
Moradi, A., Smits, K. M., Lu, N., and McCartney, J. S. (2016). "Heat transfer in unsaturated soil with application to borehole thermal energy storage." Vadose Zone Journal, 15(10).
Moradi, A., Smits, K. M., Massey, J., Cihan, A., and McCartney, J. (2015). "Impact of coupled heat transfer and water flow on soil borehole thermal energy storage (SBTES) systems: Experimental and modeling investigation." Geothermics, 57, 56-72.
Nguyen, T. S., Li, Z., Barnichon, J., and Garitte, B. (2017). "Modelling a heater experiment for radioactive waste disposal." Environmental Geotechnics, 4(2).
Ouedraogo, F., Cherblanc, F., Naon, B., and Bénet, J.-C. (2013). "Water transfer in soil at low water content. Is the local equilibrium assumption still appropriate?" Journal of hydrology, 492, 117-127.
Smits, K. M., Cihan, A., Sakaki, T., Howington, S. E., Peters, J. F., and Illangasekare, T. H. (2012). "Soil moisture and thermal behavior in the vicinity of buried objects affecting remote sensing detection: Experimental and modeling investigation." IEEE Transactions on Geoscience and Remote Sensing, 51(5), 2675-2688.
Smits, K. M., Cihan, A., Sakaki, T., and Illangasekare, T. H. (2011). "Evaporation from soils under thermal boundary conditions: Experimental and modeling investigation to compare equilibrium-and nonequilibrium-based approaches." Water Resources Research, 47(5).
Smits, K. M., Sakaki, T., Limsuwat, A., and Illangasekare, T. H. (2010). "Thermal conductivity of sands under varying moisture and porosity in drainage–wetting cycles." Vadose Zone Journal, 9(1), 172-180.
Tamizdoust, M. M., and Ghasemi-Fare, O. (2019). "Numerical Analysis on Feasibility of Thermally Induced Pore Fluid Flow in Saturated Soils." Eighth International Conference on Case Histories in Geotechnical Engineering, ASCE, Philadelphia, Pennsylvania, 73 - 82.
Tamizdoust, M. M., and Ghasemi-Fare, O. (2020). "A fully coupled thermo-poro-mechanical finite element analysis to predict the thermal pressurization and thermally induced pore fluid flow in soil media." Computers and Geotechnics, 117, 103250.
Trautz, A. C., Smits, K. M., and Cihan, A. (2015). "Continuum-scale investigation of evaporation from bare soil under different boundary and initial conditions: An evaluation of nonequilibrium phase change." Water Resources Research, 51(9), 7630-7648.
Van Genuchten, M. T. (1980). "A closed-form equation for predicting the hydraulic conductivity of unsaturated soils 1." Soil science society of America journal, 44(5), 892-898.
Zhang, J., and Datta, A. (2004). "Some considerations in modeling of moisture transport in heating of hygroscopic materials." Drying Technology, 22(8), 1983-2008.
Information & Authors
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Published In
Geo-Congress 2020: Geo-Systems, Sustainability, Geoenvironmental Engineering, and Unsaturated Soil Mechanics (GSP 319)
Pages: 349 - 357
Editors: James P. Hambleton, Ph.D., Northwestern University, Roman Makhnenko, Ph.D., University of Illinois at Urbana-Champaign, and Aaron S. Budge, Ph.D., Minnesota State University, Mankato
ISBN (Online): 978-0-7844-8282-7
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© 2020 American Society of Civil Engineers.
History
Published online: Feb 21, 2020
Published in print: Feb 21, 2020
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