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In this doctoral work, we adress various problems arising when dealing with multi-physical simulations using a segregated (non-monolithic) approach. We concentrate on a few specific problems and focus on the solution of aeroelastic flutter for linear elastic structures in compressible fl ows, conjugate heat transfer for re-entry vehicles including thermo-chemical reactions and finally, industrial electro-chemical plating processes which often include stiff source terms. These problems are often solved using specifically developed solvers, but these cannot easily be reused for different purposes. We have therefore considered the development of a flexible and reusable software platform for the simulation of multi-physics problems. We have based this development on the COOLFluiD framework developed at the von Karman Institute in collaboration with a group of partner institutions. For the solution of fl uid fl ow problems involving compressible flows, we have used the Finite Volume meth od and we have focused on the application of the method to moving and deforming computational domains using the Arbitrary Lagrangian Eulerian formulation. Validation on a series of testcases (including turbulent flows) is shown. In parallel, novel time integration methods have been derived from two popular time discretization methods. They allow to reduce the computational effort needed for unsteady fl ow computations. Good numerical properties have been obtained for both methods. For the computations on deforming domains, a series of mesh deformation techniques are described and compared. In particular, the effect of the stiffness definition is analyzed for the Solid material analogy technique. Using the techniques developed, large movements can be obtained while preserving a good mesh quality. In order to account for very large movements for which mesh deformation techniques lead to badly behaved meshes, remeshing is also considered. We also focus on the numerical discretization of a ^cl

aérolélasticité --- couplage multi-physique --- mécanique des fluides --- transfert de chaleur --- conjugate heat transfer --- aeroelasticity --- computational fluid dynamics --- fluid-structure interaction

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Recent advances in microfabrication technologies have enabled the development of entirely new classes of small-scale devices with applications in fields ranging from biomedicine (portable defibrillators, drug delivery systems, etc.), to wireless communication and computing (cell phones, laptop computers, etc.), to reconnaissance (unmanned air vehicles, microsatellites etc.), and to augmentation of human function (exoskeletons etc.). In many cases, however, what these devices can actually accomplish is limited by the low energy density of their energy storage and conversion systems. This breakthrough book brings together in one place the information necessary to develop the high energy density combustion-based power sources that will enable many of these devices to realize their full potentials.

Internal combustion engines --- Combustion --- Microfabrication. --- Manufacturing processes --- Thermochemistry --- Heat --- Smoke --- Combustion. --- Industrial applications. --- microscale combustion --- flameless combustion --- combustion limits --- combustion instability --- excess enthalpy combustion --- small-scale liquid film combustors --- micro-tubes and porous combustors --- Swiss-roll combustors --- catalytic reactors --- micro-heat engines --- micro-reactors --- micro-power generators --- micro-thrusters --- model aircraft engines --- 2-stroke engines --- piston engines --- heterogeneous combustion --- catalytic combustion --- conjugate heat transfer --- scale-effects on combustion --- thermoelectric power generation --- micro gas turbine engine --- micro-rotary engine --- micro-rockets --- microfabrication --- MEMS

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In this Special Issue, one review paper highlights the necessity of multiscale CFD, coupling micro- and macro-scales, for exchanging information at the interface of the two scales. Four research papers investigate the hydrodynamics, heat transfer, and chemical reactions of various processes using Eulerian CFD modeling. CFD models are attractive for industrial applications. However, substantial efforts in physical modeling and numerical implementation are still required before their widespread implementation.

computational fluid dynamics (CFD) --- Eulerian continuum fluid --- volume of fluid (VOF) --- multiscale simulation --- multiphase flow --- multiphysics --- chemical and biological processes --- circulating fluidized bed riser --- computational fluid dynamics --- eulerian–eulerian --- drag models --- 2D simulation --- multi-tubular reactor --- oxidative dehydrogenation (ODH) --- reactor design --- butadiene --- multiscale modeling --- liquid plunging jet --- waste water treatment --- VOF --- void fraction --- air entrainment --- conjugate heat transfer --- open-cell foams --- structured reactors --- volumetric heat sources --- fluid properties --- STAR-CCM+ --- dynamic operation

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This Special Issue compiles 11 scientific works that were presented during the International Symposium on Thermal Effects in Gas Flow in Microscale, ISTEGIM 2019, held in Ettlingen, Germany, in October 2019. This symposium was organized in the framework of the MIGRATE Network, an H2020 Marie Skłodowska-Curie European Training Network that ran from November 2015 to October 2019 (www.migrate2015.eu). MIGRATE intends to address some of the current challenges in innovation that face the European industry with regard to heat and mass transfer in gas-based microscale processes. The papers collected in this book focus on fundamental issues that are encountered in microfluidic systems involving gases, such as the analysis of gas–surface interactions under rarefied conditions, the development of innovative integrated microsensors for airborne pollutants, new experimental techniques for the measurement of local quantities in miniaturized devices and heat transfer issues inside microchannels. The variety of topics addressed in this book emphasizes that multi-disciplinarity is the real common thread of the current applied research in microfluidics. We hope that this book will help to stimulate early-stage researchers who are working in microfluidics all around the world. This book is dedicated to them!

Research & information: general --- femtosecond laser micromachining --- high order harmonic generation --- de laval gas micro nozzle --- attosecond science --- thermal effects --- substrate conductivity --- absorptive heating --- evaporative cooling --- vapor pressure difference --- reduced model --- LMTD method --- conjugate heat transfer (CHT) --- compressible fluid --- maldistribution --- gas-surface interaction --- thermal accommodation coefficient --- vacuum --- experimental study --- optical signals monitoring --- air-water flows --- slug velocity --- slug frequency --- rarefied gas --- accommodation coefficient --- molecular dynamics (MD) simulation --- Ar-Au interaction --- He-Au interaction --- mixing rules --- ab-initio potentials --- micro channel --- wire-net perturbators --- s-shaped perturbators --- high-temperature heat exchangers --- surface scanning optics --- Raman --- near infrared --- middle infrared imaging --- scanning --- multimodal spectroscopy --- local reaction control techniques --- microchannel --- cryogenics --- MATLAB® --- numerical thermal analysis --- cryocooler --- regenerator --- optimization --- ANSYS Fluent --- slip velocity --- channel flow --- molecular tagging velocimetry --- metal-oxide-semiconductor (CMOS)-based fluorescence sensing --- light emitting diode (LED)-induced fluorescence --- SU-8 2015 waveguide --- silicon fluidic cell --- 3,5-diacetyl-1,4-dihydrolutidine (DDL) --- femtosecond laser micromachining --- high order harmonic generation --- de laval gas micro nozzle --- attosecond science --- thermal effects --- substrate conductivity --- absorptive heating --- evaporative cooling --- vapor pressure difference --- reduced model --- LMTD method --- conjugate heat transfer (CHT) --- compressible fluid --- maldistribution --- gas-surface interaction --- thermal accommodation coefficient --- vacuum --- experimental study --- optical signals monitoring --- air-water flows --- slug velocity --- slug frequency --- rarefied gas --- accommodation coefficient --- molecular dynamics (MD) simulation --- Ar-Au interaction --- He-Au interaction --- mixing rules --- ab-initio potentials --- micro channel --- wire-net perturbators --- s-shaped perturbators --- high-temperature heat exchangers --- surface scanning optics --- Raman --- near infrared --- middle infrared imaging --- scanning --- multimodal spectroscopy --- local reaction control techniques --- microchannel --- cryogenics --- MATLAB® --- numerical thermal analysis --- cryocooler --- regenerator --- optimization --- ANSYS Fluent --- slip velocity --- channel flow --- molecular tagging velocimetry --- metal-oxide-semiconductor (CMOS)-based fluorescence sensing --- light emitting diode (LED)-induced fluorescence --- SU-8 2015 waveguide --- silicon fluidic cell --- 3,5-diacetyl-1,4-dihydrolutidine (DDL)

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This Special Issue compiles 11 scientific works that were presented during the International Symposium on Thermal Effects in Gas Flow in Microscale, ISTEGIM 2019, held in Ettlingen, Germany, in October 2019. This symposium was organized in the framework of the MIGRATE Network, an H2020 Marie Skłodowska-Curie European Training Network that ran from November 2015 to October 2019 (www.migrate2015.eu). MIGRATE intends to address some of the current challenges in innovation that face the European industry with regard to heat and mass transfer in gas-based microscale processes. The papers collected in this book focus on fundamental issues that are encountered in microfluidic systems involving gases, such as the analysis of gas–surface interactions under rarefied conditions, the development of innovative integrated microsensors for airborne pollutants, new experimental techniques for the measurement of local quantities in miniaturized devices and heat transfer issues inside microchannels. The variety of topics addressed in this book emphasizes that multi-disciplinarity is the real common thread of the current applied research in microfluidics. We hope that this book will help to stimulate early-stage researchers who are working in microfluidics all around the world. This book is dedicated to them!

femtosecond laser micromachining --- high order harmonic generation --- de laval gas micro nozzle --- attosecond science --- thermal effects --- substrate conductivity --- absorptive heating --- evaporative cooling --- vapor pressure difference --- reduced model --- LMTD method --- conjugate heat transfer (CHT) --- compressible fluid --- maldistribution --- gas–surface interaction --- thermal accommodation coefficient --- vacuum --- experimental study --- optical signals monitoring --- air–water flows --- slug velocity --- slug frequency --- rarefied gas --- accommodation coefficient --- molecular dynamics (MD) simulation --- Ar–Au interaction --- He–Au interaction --- mixing rules --- ab-initio potentials --- micro channel --- wire-net perturbators --- s-shaped perturbators --- high-temperature heat exchangers --- surface scanning optics --- Raman --- near infrared --- middle infrared imaging --- scanning --- multimodal spectroscopy --- local reaction control techniques --- microchannel --- cryogenics --- MATLAB® --- numerical thermal analysis --- cryocooler --- regenerator --- optimization --- ANSYS Fluent --- slip velocity --- channel flow --- molecular tagging velocimetry --- metal-oxide-semiconductor (CMOS)-based fluorescence sensing --- light emitting diode (LED)-induced fluorescence --- SU-8 2015 waveguide --- silicon fluidic cell --- 3,5–diacetyl-1,4-dihydrolutidine (DDL) --- n/a --- gas-surface interaction --- air-water flows --- Ar-Au interaction --- He-Au interaction --- 3,5-diacetyl-1,4-dihydrolutidine (DDL)