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Analytical model for arbitrarily configured neighboring shallow geothermal installations in the presence of groundwater flow

Al-Khoury, Rafid (author), BniLam, Noori (author), Musivand Arzanfudi, M. (author), Saeid, S. (author)

This paper introduces an analytical model analyzing the effect of groundwater flow on heat transfer in an infinite conductive-convective porous domain representing shallow geothermal systems with arbitrarily configured cylindrical heat sources. The model is formulated based on the moving source concept and solved based on the spectral...

journal article 2021

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Parameter identification algorithm for ground source heat pump systems

Bni Lam, N.H.N. (author), Al-Khoury, Rafid (author)

This paper presents a new parameter identification (PI) algorithm for estimating effective and detailed thermal parameters of ground source heat pump systems using data obtained from the well-known thermal response test. The PI comprises an iterative scheme coupling a semi-analytical forward model to an inverse model. The forward model is...

journal article 2020

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A spectral model for a moving cylindrical heat source in a conductive-convective domain

Al-Khoury, Rafid (author), Bni Lam, N.H.N. (author), Musivand Arzanfudi, M. (author), Saeid, S. (author)

This paper introduces a spectral model for a moving cylindrical heat source in an infinite conductive-convective domain. This physical process occurs in many engineering and technological applications including heat conduction-convection in ground source heat pump systems, where the borehole heat exchangers likely go through layers with...

journal article 2020

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Analysis of short-to-long term heat flow in GSHP systems based on heat pump power

Bni Lam, N.H.N. (author), Al-Khoury, Rafid (author)

This paper presents a semi-analytical model based on the spectral element method for three-dimensional, short-to-long term heat flow in multiple borehole, multilayer ground source heat pump systems. The model is distinguished by its computational technique for expressing the input signal at the boundary of the borehole heat exchanger, giving...

journal article 2020

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A thermo-hydro-mechanical model for energy piles under cyclic thermal loading

Musivand Arzanfudi, M. (author), Al-Khoury, Rafid (author), Sluys, Lambertus J. (author), Schreppers, G.M.A (author)

This paper introduces a thermo-hydro-mechanical finite element model for energy piles subjected to cyclic thermal loading. We address four particular features pertaining to the physics of energy piles: three-dimensionality, embedded heat exchangers, soil constitutive modeling and pile–soil interface. The model is designed to capture the...

journal article 2020

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Mass and heat flow in deformable fracturing porous media

Musivand Arzanfudi, M. (author), Al-Khoury, Rafid (author)

abstract 2019

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Freezing and thawing in deformable porous media

Al-Khoury, Rafid (author), Musivand Arzanfudi, M. (author)

abstract 2019

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Freezing-thawing of porous media: An extended finite element approach for soil freezing and thawing

Musivand Arzanfudi, M. (author), Al-Khoury, Rafid (author)

This paper introduces a thermo-hydro-mechanical computational model for freezing and thawing in porous media domains, with focus on freezing and thawing in soil. The model is formulated based on the averaging theory and discretized using a mixed discretization scheme, where the standard and extended finite element methods are simultaneously...

journal article 2018

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Multidomain-staggered coupling technique for Darcy–Navier Stokes multiphase flow: An application to CO₂ geosequestration

Musivand Arzanfudi, M. (author), Saeid, Sanaz (author), Al-Khoury, Rafid (author), Sluys, Lambertus J. (author)

This paper introduces a multidomain-staggered technique for coupling multiphase flow in a porous medium, dominated by the Darcy laminar flow, with multiphase flow in a wellbore, dominated by the Navier Stokes viscous, compressible flow. The Darcy flow in the porous medium is formulated using the averaging theory, and the Navier Stokes flow in...

journal article 2016

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A finite element model for high enthalpy two-phase flow in geothermal wellbores

Akbar, S. (author), Fathianpour, N. (author), Al-Khoury, Rafid (author)

This paper introduces a computational model for transient high enthalpy fluid flow through geothermal wellbores. The drift-flux model is utilized to formulate the physical behavior of fluid, and the constitutive relationships are described using relevant equations of state and empirical relationships. The governing equations are solved using...

journal article 2016

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A spectral model for heat transfer with friction heat gain in geothermal borehole heat exchangers

Bni Lam, N.H.N. (author), Al-Khoury, Rafid (author)

This paper introduces a semi-analytical model for the simulation of transient heat transfer with friction heat gain in a single U-tube geothermal borehole heat exchanger subjected to an arbitrary heat flux signal. The friction effect appears as a nonhomogeneous term in the governing equations, which constitutes a set of coupled partial...

journal article 2016

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A spectral model for transient heat flow in a double U-tube geothermal heat pump system

Al-Khoury, Rafid (author), Focaccia, S. (author)

This paper introduces a semi-analytical model based on the spectral analysis method for the simulation of transient conductive-convective heat flow in an axisymmetric shallow geothermal system consisting of a double U-tube borehole heat exchanger embedded in a soil mass. The proposed model combines the exactness of the analytical methods with...

journal article 2016

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Dispersion analysis of finite-element schemes for a first-order formulation of the wave equation

Shamasundar, R. (author), Al-Khoury, R.I.N. (author), Mulder, W.A. (author)

We investigated one-dimensional numerical dispersion curves and error behaviour of four finite-element schemes with polynomial basis functions: the standard elements with equidistant nodes, the Legendre-Gauss-Lobatto points, the Chebyshev-Gauss-Lobatto nodes without a weighting function and with. Mass lumping, required for efficiency reasons and...

conference paper 2015

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A Mixed Discretization Scheme for CO2 Leakage Mechanisms

Al-Khoury, Rafid (author), Musivand Arzanfudi, M. (author)

A computational model for multiple CO2 leakage mechanisms is introduced. Leakage through cap layers and abandoned wellbores are considered. For the first, leakage in a rigid heterogeneous layered medium constituting layers of different physical properties is simulated. Such a leakage exhibits a<br/>discontinuity in the saturation field at the...

abstract 2015

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A compressible two-fluid multiphase model for CO2 leakage through a wellbore

Musivand Arzanfudi, M. (author), Al-Khoury, Rafid (author)

journal article 2015

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A computational model for CO2 leakage in heterogeneous formation (abstract)

Musivand Arzanfudi, M. (author), Al-Khoury, R.I.N. (author), Sluys, L.J. (author)

conference paper 2014

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A mixed discretization scheme for CO2 sequestration in fractured porous media (abstract)

Al-Khoury, R.I.N. (author), Talebian, M. (author)

conference paper 2014

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A mixed discretization scheme for CO2 leakage through heterogeneous geological layers (abstract)

Musivand Arzanfudi, M. (author), Al-Khoury, R.I.N. (author)

conference paper 2014

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A computational model for fluid leakage in heterogeneous layered porous media

Musivand Arzanfudi, M. (author), Al-Khoury, Rafid (author), Sluys, Lambertus J. (author)

journal article 2014

document

A Hydromechanic-Electrokinetic Model for CO2 Sequestration in Geological Formations

Al-Khoury, R.I.N. (author), Talebian, M. (author), Sluys, L.J. (author)

In this contribution, a finite element model for simulating coupled hydromechanic and electrokinetic flow in a multiphase domain is outlined. The model describes CO2 flow in a deformed, unsaturated geological formation and its associated streaming potential flow. The governing field equations are derived based on the averaging theory and solved...

conference paper 2013