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Coupled thermo-hydro-mechanical model with consideration of thermal-osmosis based on modified mixture theory

Chen, Xiaohui and Pao, William K. S. and Li, Xikui (2013) Coupled thermo-hydro-mechanical model with consideration of thermal-osmosis based on modified mixture theory. [Citation Index Journal]

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Abstract

A coupled formulation based on non-equilibrium thermodynamics, Biot’s elasticity is derived to model thermal-osmotic flow in very low permeability rock. Darcy’s law has been modified by incorporating thermal effects from the dissipation process by using standard arguments of non-equilibrium thermodynamics. The relationship of chemical potential of water and pore water pressure has been analysed. Helmholtz free energy is used to construct the structure of the mechanics model. The derived coupled equations can be validated by comparing with those from Mechanics approach. Finally, finite elements are used to solve the governing equations. The numerical results show the thermal-osmosis has an important effect on water transport in very low permeability porous media.

Item Type:Citation Index Journal
Subjects:T Technology > TJ Mechanical engineering and machinery
Academic Subject One:Academic Department - Mechanical Engineering - Petroleum
Academic Subject Three:petroleum engineering
Departments / MOR / COE:Departments > Mechanical Engineering
ID Code:10944
Deposited By: Dr William Pao
Deposited On:16 Dec 2013 23:48
Last Modified:20 Mar 2017 01:59

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