Capillary Transport Of Cryogenic Liquids In Porous Structures PDF Download
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Author | : Henry Smirnov |
Publisher | : CRC Press |
Total Pages | : 406 |
Release | : 2009-07-29 |
Genre | : Science |
ISBN | : 1420062077 |
Download Transport Phenomena in Capillary-Porous Structures and Heat Pipes Book in PDF, ePub and Kindle
Two-phase nano- and micro-thermal control device research is now proving relevant to a growing range of modern applications, including those in cryogenics, thermal engineering, MEMS, and aerospace engineering. Until now, researchers have lacked a definitive resource that provides a complete review of micro- and nano-scale evaporative heat and mass
Author | : F. A. L. Dullien |
Publisher | : |
Total Pages | : 618 |
Release | : 1992 |
Genre | : Science |
ISBN | : |
Download Porous Media Book in PDF, ePub and Kindle
Capillarity in porous media. Pore structure. Single-phase transport phenomena in porous media. Selected operations involving transport of a single fluid phase throug a porous medium. Multiphase flow of immiscible fluids in porous media. Miscible displacement and dispersion.
Author | : Yulia Grebenyuk |
Publisher | : Cuvillier Verlag |
Total Pages | : 222 |
Release | : 2018-02-05 |
Genre | : Technology & Engineering |
ISBN | : 3736987277 |
Download Experimental and Theoretical Investigations of Wicking in Porous Media Book in PDF, ePub and Kindle
The aim of this work is to advance the knowledge on the behavior of fluids in porous materials. Wicking, or imbibition, is a spontaneous penetration of liquid into porous media due to capillary forces. Due to the challenges of the capillary transport of cryogenic liquids, the wicking of liquid nitrogen subjected to evaporation was of a special interest for this research. For that, a novel test facility was built to perform experiments in a one-species system under pre-defined non-isothermal conditions. Two one-dimensional macroscopic wicking models were proposed to evaluate the impact of the porous sample superheat, geometrical and structural characteristics as well as the impact of the vapor flow created due to evaporation. In the second part of this work, the capillary transport abilities of porous ceramic monoliths of anisotropic structure were studied. The polymer-derived ceramic samples fabricated with the freeze-casting method were characterized via vertical wicking tests. In the third part, the capillary transport properties of porous media and the wicking process were examined using the computational fluid dynamics software. The results of benchmark microscopic and macroscopic simulations may serve as a basis for further numerical investigations of fluid flow problems in porous media.
Author | : Kambiz Vafai |
Publisher | : CRC Press |
Total Pages | : 927 |
Release | : 2000-07-12 |
Genre | : Science |
ISBN | : 0824741501 |
Download Handbook of Porous Media Book in PDF, ePub and Kindle
"Presents the most important and up-to-date research related to heat transfer in porous media, focusing on practical applications of the latest studies to engineering products and procedures. Includes theoretical models of fluid flow, capillary effects, application of fractal and percolation characterizing porous materials, multiphase flow and heat transfer, turbulent flow and heat transfer, improved measurement and flow visualization techniques, and enhanced design correlations."
Author | : André Pingel |
Publisher | : Cuvillier Verlag |
Total Pages | : 400 |
Release | : 2022-08-04 |
Genre | : Technology & Engineering |
ISBN | : 3736966423 |
Download Experimental and Theoretical Investigations of the Physical Processes Related to the Retention Capability of a Double Screen Element against Liquid Hydrogen in Earth's Gravity and in Microgravity with Respect to the Applied Stimuli Book in PDF, ePub and Kindle
Metal screens are commonly used as components for fluid handling in spacecraft and rocket tank designs. In most cases, the screens perform a passive separation of the propellant phases. The separation of the liquid from the gaseous propellant phase, is a special challenge. Liquid-gas phase separation means that the gaseous phase is allowed to enter a phase separation device while the liquid phase is blocked. The technical application of this process is the depressurization in a propellant tank. A certain amount of the gaseous propellant phase is vented from the tank through the gas port. The liquid propellant phase remains in the tank in order to be stored for the engine. However, if the tank causes a liquid movement during the depressurization, a part of the liquid can potentially enter the gas port. In order to prevent the unwanted liquid outflow, a separation of the liquid from the gas is necessary. This is possible with the aid of a double screen element and has already been performed for storable liquids in Earth’s gravity and microgravity as well as for cryogenic liquids in Earth’s gravity. At the current state of the art, the separation of the liquid from the gaseous phase of the cryogenic propellant hydrogen using a double screen element has not been performed in microgravity. However, with regard to a possible application, it is mandatory to investigate the function of the double screen element for the real propellant under relevant environmental conditions. In this work, a cryogenic test facility has been developed and operated successfully under Earth’s gravity and microgravity conditions using the drop tower at the University of Bremen. Hereby, the original, cryogenic propellant phases: liquid and gaseous hydrogen, have been used. The experiments show the appearance of the physical processes which are related to the retention capability of a double screen element against liquid hydrogen. Furthermore, these physical processes can obviously be influenced by an unknown boundary condition at the screens: the screen saturation. This unknown boundary condition in turn can obviously be influenced by a certain stimulus which causes a special, fluid mechanical process. A simplified mathematical and two numerical models have been developed which combine the observed, physical processes in the experiments. Two fitting parameters are introduced which influence the flow through screen pressure loss of the liquid and the gaseous hydrogen phase. After the fitting to experimental data, the two fitting parameters have been interpreted with respect to a possible screen saturation. The results lead to a prediction of the unknown boundary condition and indicate that a partial saturation of the screens with liquid could be present in each considered experiment. This can possibly lead to a major influence of the overall resistance of the double screen element against liquid hydrogen.
Author | : Nicolas Fries |
Publisher | : |
Total Pages | : 167 |
Release | : 2010 |
Genre | : |
ISBN | : 9783869555072 |
Download Capillary Transport Processes in Porous Materials Book in PDF, ePub and Kindle
Author | : Sadik Kakaç |
Publisher | : Springer Science & Business Media |
Total Pages | : 489 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9401000999 |
Download Low Temperature and Cryogenic Refrigeration Book in PDF, ePub and Kindle
Refrigeration plays a prominent role in our everyday lives, and cryogenics plays a major role in medical science, space technology and the cooling of low-temperature electronics. This volume contains chapters on basic refrigeration systems, non-compression refrigeration and cooling, and topics related to global environmental issues, alternative refrigerants, optimum refrigerant selection, cost-quality optimization of refrigerants, advanced thermodynamics of reverse-cycle machines, applications in medicine, cryogenics, heat pipes, gas-solid absorption refrigeration, multisalt resorption heat pumps, cryocoolers, thermoacoustic refrigeration, cryogenic heat transfer and enhancement and other topics covering theory, design, and applications, such as pulse tube refrigeration, which is the most efficient of all cryocoolers and can be used in space missions.
Author | : Lixin Cheng |
Publisher | : Bentham Science Publishers |
Total Pages | : 316 |
Release | : 2010-04-21 |
Genre | : Science |
ISBN | : 1608050947 |
Download Advances in Multiphase Flow and Heat Transfer Book in PDF, ePub and Kindle
"Multiphase flow and heat transfer have found a wide range of applications in several engineering and science fields such as mechanical engineering, chemical and petrochemical engineering, nuclear engineering, energy engineering, material engineering, ocea"
Author | : Ibrahim Dinçer |
Publisher | : John Wiley & Sons |
Total Pages | : 467 |
Release | : 2011-08-10 |
Genre | : Science |
ISBN | : 1119956706 |
Download Refrigeration Systems and Applications Book in PDF, ePub and Kindle
Refrigeration Systems and Applications, 2nd edition offers a comprehensive treatise that addresses real-life technical and operational problems, enabling the reader to gain an understanding of the fundamental principles and the practical applications of refrigeration technology. New and unique analysis techniques (including exergy as a potential tool), models, correlations, procedures and applications are covered, and recent developments in the field are included - many of which are taken from the author's own research activities in this area. The book also includes some discussion of global warming issues and its potential solutions. Enables the reader to gain an understanding of the fundamental principles and the practical applications of refrigeration technologies. Discusses crucial industrial technical and operational problems, as well as new performance improvement techniques and tools for better design and analysis. Includes fundamental aspects of thermodynamics, fluid flow, and heat transfer; refrigerants; refrigeration cycles and systems; advanced refrigeration cycles and systems, including some novel applications; heat pumps; heat pipes; and many more. Provides easy to follow explanations, numerous new chapter-end problems and worked-out examples as learning aids for students and instructors. Refrigeration is extensively used in a variety of thermal engineering applications ranging from the cooling of electronic devices to food cooling processes. Its wide-ranging implications and applications mean that this industry plays a key role in national and international economies, and it continues to be an area of active research and development. Refrigeration Systems and Applications, 2nd edition forms a useful reference source for graduate and postgraduate students and researchers in academia and as well as practicing engineers working in this important field who are interested in refrigeration systems and applications and the methods and analysis tools for their analysis, design and performance improvement.
Author | : Alexandr A. Berlin |
Publisher | : CRC Press |
Total Pages | : 392 |
Release | : 2018-07-17 |
Genre | : Science |
ISBN | : 0429843151 |
Download The Chemistry and Physics of Engineering Materials Book in PDF, ePub and Kindle
This new volume focuses on the limitations, properties, and models in the chemistry and physics of engineering materials that have potential for applications in several disciplines of engineering and science. Contributions range from new methods to novel applications of existing methods. The collection of topics in this volume reflects the diversity of recent advances in chemistry and physics of engineering materials with a broad perspective that will be useful for scientists as well as for graduate students and engineers. This new book presents leading-edge research from around the world. Topics in the book include: • aerogels materials and technology • diffusion dynamics in nanomaterials • entropic nomograms • structural analyses of particulate-filled polymer nanocomposites mechanical properties • protection of rubbers against aging • structure-property correlation and forecast of corrosion This volume is also sold as part of a two-volume set. Volume 1 focuses on modern analytic methodologies in the chemistry and physics of engineering materials.