Thèses sur le sujet « Forchheimer flows »
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THIEU, THI KIM THOA. « Models for coupled active--passive population dynamics : mathematical analysis and simulation ». Doctoral thesis, Gran Sasso Science Institute, 2020. http://hdl.handle.net/20.500.12571/15016.
Texte intégralZhang, Andi. « Numerical investigation of multiphase Darcy-Forchheimer flow and contaminant transport during SO₂ co-injection with CO₂ in deep saline aquifers ». Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49065.
Texte intégralKC, Amar. « Numerical Simulations of Magnetohydrodynamic Flow and Heat Transfer ». University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1411495287.
Texte intégralBrihi, Sarra. « Mathematical analysis and numerical approximation of flow models in porous media ». Thesis, Normandie, 2018. http://www.theses.fr/2018NORMC263/document.
Texte intégralThis thesis is devoted to Darcy Brinkman Forchheimer (DBF) equations with a non standard boundary conditions. We prove first the existence of different type of solutions (weak, strong) of the stationary DBF problem in a simply connected domain with boundary conditions on the normal component of the velocity field and the tangential component of the vorticity. Next, we consider Brinkman Forchheimer (BF) system with boundary conditions on the pressure in a non simply connected domain. We prove the well-posedness and the existence of a strong solution of this problem. We establish the regularity of the solution in the L^p spaces, for p >= 2.The approximation of the non stationary DBF problem is based on the pseudo-compressibility approach. The second order's error estimate is established in the case where the boundary conditions are of type Dirichlet or Navier. Finally, the finite elements Galerkin Discontinuous method is proposed and the convergence is settled concerning the linearized DBF problem and the non linear DBF system with a non standard boundary conditions
Kureksiz, Ozge. « Non-darcian Flow Through Rockfills ». Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609720/index.pdf.
Texte intégralClearman, William M. « Measurement and correlation of directional permeability and Forchheimer's inertial coefficient of micro porous structures used in pulse tube cryocoolers ». Thesis, Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-07092007-111541/.
Texte intégralKirkconnell, Carl S., Committee Member ; Ghiaasiaan, S. Mostafa, Committee Chair ; Desai, Prateen V., Committee Member ; Jeter, Sheldon M., Committee Member.
Bailly, David. « Vers une modélisation des écoulements dans les massifs très fissurés de type karst : étude morphologique, hydraulique et changement d'échelle ». Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT027H/document.
Texte intégralKarstic aquifers contain large subsurface water resources. These aquifers are complex and heterogeneous on a large range of scales. Their management requires appropriate numerical tools and approaches. Various tools and numerical methodologies have been developed to characterize andmodel the geometry and hydraulic properties of karstic aquifers, more generally, of highly fissured 2D and 3D porous media. In this study, we emphasize morphological characterization, and we analyze hydrodynamic behavior through the concept of upscaling ("second upscaling"). Concerning the morphology of fissured porous media, several axes are explored : random media, composite random Boolean media with statistical properties, and morphogenetic models. Hydrodynamic upscaling is developed using the macro-permeability concept. This upscaling method is based on either Darcy's linear law, or on a linear/quadratic combination of Darcy's and Ward-Forchheimer's quadratic law (inertial effects). First, the study focuses on Darcy's linear head loss law, and Darcian effective permeabilities are calculated numerically in terms of volume fractions of fissures and "fissure/matrix" permeability contrasts. The results are analysed and compared with analytical results and bounds. A special study of percolation and quasi-percolation effects, for high contrasts, leads to defined three critical fractions. These critical fractions are "connected" to percolation thresholds. Secondly, in order to consider inertial effect in fissures, the study is extended to a local law with a quadratic velocity term (Darcy/Ward-Forchheimer). Then, an equivalent nonlinear macroscopic permeability is defined and analysed using a generalized inertial model (linear/power). Finally, the large scale hydraulic anisotropy of fissured medium is studied, in terms of directional permeabilities, using an "immersion" numerical method
Terblanche, Luther. « The prediction of flow through two-dimensional porous media ». Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/1722.
Texte intégralWhen considering flow through porous media, different flow regimes may be identified. At very small Reynolds numbers the relation between the pressure gradient and the velocity of the fluid is linear. This flow regime ...
Kim, Sung-Min. « Numerical investigation on laminar pulsating flow through porous media ». Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22601.
Texte intégralCommittee Co-Chair: Dr. S. Mostafa Ghiaasiaan; Committee Co-Chair: Dr. S.I. Abdel-Khalik; Committee Member: Dr. Sheldon M. Jeter.
Pathak, Mihir Gaurang. « Periodic flow physics in porous media of regenerative cryocoolers ». Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49056.
Texte intégralZou, Zhenhai. « Etude de l'éjection de grains hors d'un cylindre pressurisé ». Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0412.
Texte intégralWe consider a hypothetical scenario of reactivity initiated accident in a nuclear power plant. The violence of the so-called fuel-coolant interaction phenomena depends strongly on the flow rate of particles out of the gas pressurized rod. The aim of this thesis was to study how this discharge rate is driven by the internal geometry and the pressurized gas. We focused firstly on the discharge of a rectangular silo with an inclined bottom. For a small inclination angle, the granular flow orientation is controlled by the wall friction, whereas a large inclination angle fully determines this orientation. Secondly, we focused on two configurations with pressurized gas : a case with constant gas overpressure at the top of the silo and a more transient case for which an initial larger overpressure initiates the rupture of an orifice. The granular flow rate increases significantly with the gas flow, especially for the finer particles and the large overpressures. In both cases, the flow rate scales with a modified Beverloo law where the gas pressure gradient near the outlet acts as an additional driving force. The pressure gradient is well described by a Forchheimer resistance law through the granular medium. We therefore propose a quasi-steady model for the transient description of the granular flow rate. The two configurations were successfully reproduced by numerical simulations based on a continuum multiphase model. For the larger flow rates, instabilities of the granular jet were found to be initiated by pressure oscillations in the outlet region. The presence of water surrounding the silo only acts through an additional hydrostatic pressure effect
Landrum, Evan. « Anisotropic parameters of mesh fillers relevant to miniature cryocoolers ». Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28159.
Texte intégralCommittee Chair: Ghiaasiaan, S. Mostafa; Committee Member: Desai, Prateen; Committee Member: Jeter, Sheldon; Committee Member: Kirkconnell, Carl.
Ma, Huiping. « Microscopic analysis of high Forchheimer number flow in porous media ». 1994. http://hdl.handle.net/1993/18178.
Texte intégral郭建宏. « Darcy-forchheimer drag tensor for fluid flow through a non-orthotropic porous medium ». Thesis, 2000. http://ndltd.ncl.edu.tw/handle/26899921748993615562.
Texte intégralChen, Yi-Jun, et 陳奕均. « Modeling of Darcy-Forchheimer Drag Tensor for Fluid Flow through a Non-Orthotropic Porous Medium ». Thesis, 2002. http://ndltd.ncl.edu.tw/handle/16408520879348918292.
Texte intégralEck, Bradley Joseph. « Drainage hydraulics of porous pavement : coupling surface and subsurface flow ». Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-1080.
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Chaudhary, Kuldeep. « Pore-scale controls of fluid flow laws and the cappillary trapping of CO₂ ». 2013. http://hdl.handle.net/2152/22083.
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Klenzendorf, Joshua Brandon. « Hydraulic conductivity measurement of permeable friction course (PFC) experiencing two-dimensional nonlinear flow effects ». Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-977.
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