Non-Darcy natural convection in a hydrodynamically and thermally anisotropic porous medium

Nithiarasu, Perumal; Sujatha, K.; Ravindran, K.; Sundararajan, T.; Seetharamu, K. N.

doi:10.1016/s0045-7825(99)00163-2

Cited by 37 publications

(29 citation statements)

References 24 publications

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“…Researchers in geotechnical engineering have developed a number of the THM models, including (1) coupled models for heat, moisture, and/or air transfer [10][11][12][13][14][15][16][17][18][19][20], (2) granular-level freezing process of pore water in soillike porous media [21][22][23][24][25][26], and (3) frost heaving in earth structures [27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Coupled Thermo-hydro-mechanical (Thm) Modelsmentioning

confidence: 99%

Nonparametric Monitoring for Geotechnical Structures Subject to Long-Term Environmental Change

Yun

Reddi

2011

Advances in Civil Engineering

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A nonparametric, data-driven methodology of monitoring for geotechnical structures subject to long-term environmental change is discussed. Avoiding physical assumptions or excessive simplification of the monitored structures, the nonparametric monitoring methodology presented in this paper provides reliable performance-related information particularly when the collection of sensor data is limited. For the validation of the nonparametric methodology, a field case study was performed using a full-scale retaining wall, which had been monitored for three years using three tilt gauges. Using the very limited sensor data, it is demonstrated that important performance-related information, such as drainage performance and sensor damage, could be disentangled from significant daily, seasonal and multiyear environmental variations. Extensive literature review on recent developments of parametric and nonparametric data processing techniques for geotechnical applications is also presented.

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Section: Coupled Thermo-hydro-mechanical (Thm) Modelsmentioning

confidence: 99%

Nonparametric Monitoring for Geotechnical Structures Subject to Long-Term Environmental Change

Yun

Reddi

2011

Advances in Civil Engineering

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“…Here, ΔT is the temperature difference between the mid height nodes at the vertical walls (Nithiarasu et al [2]). …”

Section: Mathematical Formulationmentioning

confidence: 99%

“…The simulation results are compared with the available literature [2,10,23] and the following strategies have been used.…”

Section: Grid Independence and Validationmentioning

confidence: 99%

“…Such applications include thermal insulation, certain biological materials, casting of metal matrix composites, flow in mushy region of a solidifying alloy and flow past heat exchanger tubes [1,2]. The problem of heat source located on the bottom surface of a porous layer finds applications in disposal of nuclear wastes, electronic circuits, geothermal areas which consists of troughs of volcanic debris contained by walls of non-fragmented ignimbrite [3,4].…”

Section: Introductionmentioning

confidence: 99%

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Natural convection in a non-Darcy anisotropic porous cavity with a finite heat source at the bottom wall

Krishna

Basak

Das

2009

International Journal of Thermal Sciences

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“…Its contribution goes to zero out of the granular material. A similar approach was rst presented in [63] and has later been used by Nithiarasu and coworkers [43], [45], [44] to study the natural and forced convective ux in a cavity lled by a variable porosity medium.…”

Section: Introductionmentioning

confidence: 97%

Finite Element Modeling of Free Surface Flow in Variable Porosity Media

Larese

Rossi

Oñate

2014

Arch Computat Methods Eng

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The aim of the present work is to present an overview of some numerical procedures for the simulation of free surface ows within a porous structure. A particular algorithm developed by the authors for solving this type of problems is presented. A modied form of the classical Navier Stokes equations is proposed, with the principal aim of simulating in a unied way the seepage ow inside rocklllike porous material and the free surface ow in the clear uid region. The problem is solved using a semi-explicit stabilized fractional step algorithm where velocity is calculated using a 4th order Runge-Kutta scheme. The numerical formulation is developed in an Eulerian framework using a level set technique to track the evolution of the free surface. An edge-based data structure is employed to allow an easy OpenMP parallelization of the resulting nite element code. The numerical model is validated against laboratory experiments on small scale rockll dams and is compared with other existing methods for solving similar problems.Keywords Seepage into porous media · Seepage in rockll · Non linear Darcy · Non linear resistance law · Semi-explicit fractional step · Level set · Free surface ows.

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Non-Darcy natural convection in a hydrodynamically and thermally anisotropic porous medium

Cited by 37 publications

References 24 publications

Nonparametric Monitoring for Geotechnical Structures Subject to Long-Term Environmental Change

Nonparametric Monitoring for Geotechnical Structures Subject to Long-Term Environmental Change

Natural convection in a non-Darcy anisotropic porous cavity with a finite heat source at the bottom wall

Finite Element Modeling of Free Surface Flow in Variable Porosity Media

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