Download or read book Numerical Investigations of Conjugate Porous Media Model written by Putra Hanif Agson Gani and published by . This book was released on 2022 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Predicting the conjugate heat transfer and fluid flow behavior in porous media is still a challenging research area in many applications due to the complex nature of the flow. This thesis is divided into three topics. The first two topics focus on the numerical modeling of conjugate porous media in the mine ventilation network and geothermal heat exchanger settings. The third topic solves the expensive computational cost of the previous topics by developing a reduced-order semi conjugate heat transfer model for a double-pipe heat exchanger. In the first part of the thesis, conjugate porous media in mine ventilation network is discussed. The porous media is formed as a broken rock structure which is created due to the mining operations (e.g., blasting and hauling). In this thesis, a novel friction factor correlation which describes the effect of porous zone in the model is integrated into the mine ventilation network software which solves a one-dimensional model. The correlation accuracy is verified with three-dimensional computational fluid dynamic models. In the second part of the thesis, conjugate porous media is applied to enhance the heat transfer performance of the closed-loop double-pipe geothermal heat exchanger. The porous zone was created at the bottom of the well with the hydraulic fracturing process, and fractal theory is implemented to emulate the tree-like porous structure. The results suggest that this novel geothermal heat exchanger design improves the heat extraction rate by 90%, which indicates the potential of the implementation of this design. Both conjugate porous media applications in mine ventilation networks and geothermal heat exchangers are numerically investigated based on conservation equations of mass, momentum, and energy in a three-dimensional (3D) model and two-dimensional (2D) axisymmetric model, respectively. However, numerical modeling of these systems could be computationally expensive due to its typical large domains and long operational time. Therefore, in the third part of the thesis, a novel computationally efficient one-plus-one-dimensional (1+1D) semi-conjugate heat transfer model is proposed. The proposed model solves the transient conservation equation of energy in radial coordinate coupled with the space marching algorithm to save computational time and cost. Lastly, thermal superposition theory is also implemented to expand the single borehole model into double boreholes and 3-by-3 boreholes"--

Download or read book Numerical Investigations of the Fluid Flow Through Rotating Porous Media at Both the Microscopic Scale and the Macroscopic Scale written by Eugeniusz Sawicki and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Porous Media written by Wolfgang Ehlers and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present volume offers a state-of-the-art report on the various recent sci entific developments in the Theory of Porous Media (TPM) comprehending the basic theoretical concepts in continuum mechanics on porous and mul tiphasic materials as well as the wide range of experimental and numerical applications. Following this, the volume does not only address the sophisti cated reader but also the interested beginner in the area of Porous Media by presenting a collection of articles. These articles written by experts in the field concern the fundamental approaches to multiphasic and porous materials as well as various applications to engineering problems. In many branches of engineering just as in applied natural sciences like bio- and chemomechanics, one often has to deal with continuum mechanical problems which cannot be uniquely classified within the well-known disci plines of either "solid mechanics" or "fluid mechanics". These problems, characterized by the fact that they require a unified treatment of volumetri cally coupled solid-fluid aggregates; basically fall into the categories of either mixtures or porous media. Following this, there is a broad variety of problems ranging in this category as for example the investigation of reacting fluid mix tures or solid-fluid suspensions as well as the investigation of the coupled solid deformation and pore-fluid flow behaviour of liquid- and gas-saturated porous solid skeleton materials like geomaterials (soil, rock, concrete, etc. ), polymeric and metallic foams or biomaterials (hard and soft tissues, etc).

Download or read book Numerical Investigations of the Fluid Flow Through Rotating Porous Media at Both the Microscopic Scale and the Macroscopic Scale written by Eugeniusz Sawicki and published by . This book was released on 2004 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of the present work is to highlight Coriolis effects on the flow through rotating porous media at both the microscopie scale and the macroscopic scale. This report is organized in seven chapters. The aim of the first chapter is to give a review of experimental results and models already proposed about flow and transport phenomena in rotating porous media. Chapter 2 is devoted to a brief presentation of the homogenization theory. We focus our attention on the homogenization method of multiple scale of expansions for periodic structures which has been used in Auriault (2000, 2002) to derive Darcy's law in non-Galilean frame from the description at the pore scale. The main results already published in these papers are presented in Chapter 3. ln Chapter 4, the methodology and the numerical methods that will be used in Chapters 5 and 6 in order to investigate Coriolis effects on the fluid flow at the microscopie scale, Le. on the permeability of a porous medium are presented. The aim of Chapters 5 and 6 is to investigate the evolution of the effective parameters rotating periodic arrays of cylinders and spheres, respectively according to their geometrical properties : the radius of cylinde or spheres, the solid volume fraction, the arrangement of cylinders (square, triangular, rectangular) or spheres (simple cubic, bodycentered cubic), and according to the angular velocity (magnitude, direction with respect to the microstructure). Chapter 7 is devoted to numerical investigations of the flow through rotating porous media at the macroscopic scale. An experimental method to determine the permeability tensor of rotating porous medium is proposed.

Download or read book Numerical Investigations of Heat and Mass Transfer in a Saturated Porous Cavity with Soret and Dufour Effects written by Khaled Abdulhussein Jebear Al-Farhany and published by . This book was released on 2012 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mass and thermal transport in porous media play an important role in many engineering and geological processes. The hydrodynamic and thermal effects are two interesting aspects arising in the research of porous media. This thesis is concerned with numerical investigations of double-diffusive natural convective heat and mass transfer in saturated porous cavities with Soret and Dufour effects. An in-house FORTRAN code, named ALFARHANY, was developed for this study. The Darcy-Brinkman-Forchheimer (generalized) model with the Boussinesq approximation is used to solve the governing equations. In general, for high porosity (more than 0.6), Darcy law is not valid and the effects of inertia and viscosity force should be taken into account. Therefore, the generalized model is extremely suitable in describing all kinds of fluid flow in a porous medium. The numerical model adopted is based on the finite volume approach and the pressure velocity coupling is treated using the SIMPLE/SIMPLER algorithm as well as the alternating direction implicit (ADI) method was employed to solve the energy and species equations. Firstly, the model validation is accomplished through a comparison of the numerical solution with the reliable experimental, analytical/computational studies available in the literature. Additionally, transient conjugate natural convective heat transfer in two-dimensional porous square domain with finite wall thickness is investigated numerically. After that the effect of variable thermal conductivity and porosity investigated numerically for steady conjugate double-diffusive natural convective heat and mass transfer in two-dimensional variable porosity layer sandwiched between two walls. Then the work is extended to include the geometric effects. The results presented for two different studies (square and rectangular cavities) with the effect of inclination angle. Finally, the work is extended to include the Soret and Dufour effects on double-diffusive natural convection heat and mass transfer in a square porous cavity. In general, the results are presented over wide range of non-dimensional parameters including: the modified Rayleigh number (100 d"Ra* d"1000), the Darcy number (10-6 d"Da d"10-2), the Lewis number (0.1 d"Le d"20), the buoyancy ratio ( -5 d"N d"5), the thermal conductivity ratio (0.1 d"Kr d"10), the ratio of wall thickness to its height (0.1 d"D d"0.4), the Soret parameter ( -5 d"Sr d"5), and the Dufour parameter ( -2 d"Df d"2).

Download or read book Convection in Porous Media written by D.A. Nield and published by Springer Science & Business Media. This book was released on 2006-12-06 with total page 655 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition includes nearly 1000 new references.

Download or read book Water resources Investigations Report written by and published by . This book was released on 1991 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling Transport Phenomena in Porous Media with Applications written by Malay K. Das and published by Springer. This book was released on 2017-11-21 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an ensemble of six major chapters, an introduction, and a closure on modeling transport phenomena in porous media with applications. Two of the six chapters explain the underlying theories, whereas the rest focus on new applications. Porous media transport is essentially a multi-scale process. Accordingly, the related theory described in the second and third chapters covers both continuum‐ and meso‐scale phenomena. Examining the continuum formulation imparts rigor to the empirical porous media models, while the mesoscopic model focuses on the physical processes within the pores. Porous media models are discussed in the context of a few important engineering applications. These include biomedical problems, gas hydrate reservoirs, regenerators, and fuel cells. The discussion reveals the strengths and weaknesses of existing models as well as future research directions.

Download or read book Convection in Porous Media written by Donald A. Nield and published by Springer. This book was released on 2017-03-15 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated edition of a widely admired text provides a user-friendly introduction to the field that requires only routine mathematics. The book starts with the elements of fluid mechanics and heat transfer, and covers a wide range of applications from fibrous insulation and catalytic reactors to geological strata, nuclear waste disposal, geothermal reservoirs, and the storage of heat-generating materials. As the standard reference in the field, this book will be essential to researchers and practicing engineers, while remaining an accessible introduction for graduate students and others entering the field. The new edition features 2700 new references covering a number of rapidly expanding fields, including the heat transfer properties of nanofluids and applications involving local thermal non-equilibrium and microfluidic effects.

Download or read book Numerical Investigations of Degenerate Equations for Fluid Flow and Reactive Transport in Clogging Porous Media written by Simon Zech and published by . This book was released on 2021 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Numerical Heat Transfer Volume 2 written by W. Minkowycz and published by Routledge. This book was released on 2018-12-13 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the advances in numerical heat transfer modeling by applying high-performance computing resources, striking a balance between generic fundamentals, specific fundamentals, generic applications, and specific applications.

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1987 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fluid Mechanics and Fluid Power written by T. Prabu and published by Springer Nature. This book was released on 2021-08-03 with total page 901 pages. Available in PDF, EPUB and Kindle. Book excerpt: div="" style="" This book comprises select proceedings of the 46th National Conference on Fluid Mechanics and Fluid Power (FMFP 2019). The contents of this book focus on aerodynamics and flow control, computational fluid dynamics, fluid structure interaction, noise and aero-acoustics, unsteady and pulsating flows, vortex dynamics, nuclear thermal hydraulics, heat transfer in nanofluids, etc. This book serves as a useful reference beneficial to researchers, academicians and students interested in the broad field of mechanics. ^

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1990 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nanofluids written by Mohammad Mehdi Rashidi and published by Elsevier. This book was released on 2024-07-17 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanofluids are a new class of heat transfer fluids engineered by dispersing and stably suspending nanoparticles in traditional heat transfer fluids. Recently they have obtained global attention from the scientific community owing to their unique properties and significant applications in different engineering fields. Nanofluids: Preparation, Applications and Simulation Methods provides a comprehensive review of recent advances in this important research field. Different approaches for preparing some remarkable families of nanofluids such as aluminum oxide-based nanofluids, CuO/Cu-based nanofluids, carbon nanotubes/graphene-based nanofluids, ZnO-based nanofluids, Fe3O4-based nanofluids, and SiO2-based nanofluids are discussed in detail as well as their current and potential applications. Different approaches for numerical, semi-analytical and analytical simulations are also discussed including molecular dynamics, the Lattice Boltzmann method, and spectral methods, as well as advanced analytical techniques such as the Differential Transform Method, the Homotopy Analysis Method, and Optimal Homotopy Analysis. The book will be a valuable reference resource for academic and industrial researchers, materials scientists and engineers, nanotechnologists, and chemists working in the development of nanomaterials and nanofluids for heat transfer in energy and engineering applications. - Covers the synthesis of nanostructures, preparation of nanofluids, different applications and proposed models for fluid mechanics and heat transfer - Presents recent advances on preparation methods, including green chemistry-based methods for preparation of nanomaterials and nanofluids - Includes novel model-based approaches such as molecular dynamics and Lattice Boltzmann methods - Delves into applications in renewable energy technologies and thermal management - Contains a Semi-analytical approach for solving Time-Fractional Navier-Stokes Equation

Download or read book Numerical Modeling and Computer Simulation written by Dragan Cvetković and published by BoD – Books on Demand. This book was released on 2020-05-06 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Information technologies have changed people’s lives to a great extent, and now it is almost impossible to imagine any activity that does not depend on computers in some way. Since the invention of first computer systems, people have been trying to avail computers in order to solve complex problems in various areas. Traditional methods of calculation have been replaced by computer programs that have the ability to predict the behavior of structures under different loading conditions. There are eight chapters in this book that deal with: optimal control of thermal pollution emitted by power plants, finite difference solution of conjugate heat transfer in double pipe with trapezoidal fins, photovoltaic system integrated into the buildings, possibilities of modeling Petri nets and their extensions, etc.

Download or read book Heat Pipes and Solid Sorption Transformations written by L.L Vasiliev and published by CRC Press. This book was released on 2013-05-08 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing clean energy and utilizing waste energy has become increasingly vital. Research targeting the advancement of thermally powered adsorption cooling technologies has progressed in the past few decades, and the awareness of fuel cells and thermally activated (heat pipe heat exchangers) adsorption systems using natural refrigerants and/or alternatives to hydrofluorocarbon-based refrigerants is becoming ever more important. Heat Pipes and Solid Sorption Transformations: Fundamentals and Practical Applications concentrates on state-of-the-art adsorption research and technologies for relevant applications based on the use of efficient heat transfer devices—heat pipe and two-phase thermosyphons—with the objectives of energy efficiency and sustainability. This book also discusses heat pipe thermal control as it relates to spacecraft applications. The first few chapters of Heat Pipes and Solid Sorption Transformations: Fundamentals and Practical Applications focus on heating and cooling, the principles of adsorption, adsorption dynamics, and the availability of three-phase boundaries. Other chapters cover successful heat pipe applications and heat-pipe-based thermal control of fuel cells, solid sorption transformers, and electronic components and air-condition devices. The final chapters summarize the achievements in the field of heat and mass transfer study in heat pipes with variable properties such as gas loaded heat pipes. Several configurations of thermosyphons are showcased, with suggested applications. A number of examples of equipment using the thermosyphon technology are presented and, in the final chapter, the concept of flow boiling and flow condensation heat transfer in micochannels is analyzed in detail.