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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 59 for “"bubble growth"”.
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Bubble growth rates at reduced pressure.
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1969.
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Bubble growth dynamics for C3F8 bubble chambers
… dark matter search experiment that utilizes bubble chambers and the acoustics of growing bubbles to discriminate signal from background events [5]. It has been shown that temperature perturbations from equilibrium significantly affect the growth of a bubble in superheated water [17], …
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Bubble Growth Rates in Boiling Binary Mixtures
Made available in DSpace on 2014-12-08T23:18:11Z (GMT). No. of bitstreams: 1 6511897.pdf: 3626178 bytes, checksum: 1c292b1db7d2d327aab0c2d8ab283976 (MD5) Previous issue date: 1965
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Bubble Growth in Nucleate Boiling of a Binary Mixture
Made available in DSpace on 2014-12-05T17:15:31Z (GMT). No. of bitstreams: 1 6003880.pdf: 4519896 bytes, checksum: bb70302f2bb444955eb5bfcd532c6be9 (MD5) Previous issue date: 1960
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The effects of orientation angle, subcooling, heat flux, mass flux, and pressure on bubble growth and detachment in subcooled flow boiling
… heat flux, mass flux, and pressure on bubble growth and detachment in subcooled flow boiling were studied using a high-speed video camera in conjunction with a two-phase flow loop that can accommodate a wide range of flow conditions. Specifically, orientation angles of 0' …
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QUASI-STATIC BUBBLE SHAPE ANALYSIS IN THE DEVELOPMENT OF MODELS FOR ADIABATIC AND DIABATIC GROWTH AND DEPARTURE
… the changing shape and size of a growing bubble. Indeed, any analysis of thermal transport due to nucleate pool boiling requires bubble frequency predictions which are intimately linked to bubble volume. The model is developed and validated for quasi-static bubble growth due to gas …
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EXPERIMENTAL AND NUMERICAL STUDIES OF BUBBLE DEVELOPMENT PROCESS IN ROTATIONAL FOAM MOLDING
… to elucidate the underlying mechanisms in the bubble transformation process and provide an accurate basis for predicting the morphological structure and macroscopic properties of the foamed materials. It was found that the foaming mechanism is comprised of four distinct stages: two stages of …
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Fission Gas Transport and Its Interaction With Irradiation Induced Defects in Lanthanum Doped Ceria
… of dislocation loops, voids and gas bubble structures created by irradiation. More importantly, this systematic experimental work has provided key insights into the understanding of the mechanisms of defect evolution in the materials investigated. A model including both defect …
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Modeling and simulation of liquid microlayer formation and evaporation in nucleate boiling using computational fluid dynamics
… flow boiling can occur in hot sub-channels. As a bubble grows outside of a surface imperfection during nucleate boiling, viscous stresses at the wall can be strong enough to impede liquid motion and trap a thin liquid layer - referred to as microlayer, underneath the growing bubble. The …
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Autonomous Experimentation to Accelerate Boiling Heat Transfer Research
… capable of real-time measurement of essential bubble dynamic parameters, including nucleation site density, bubble growth time, wait time, departure diameter, dry area fraction and distribution, and contact line density. To this end, a machine learning (ML) methodology was developed to …
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Design and Construction of a Subcooled Boiling Flow Loop with an Internally Heated Vertical Annulus for Use in Testing Departure from Nucleate Boiling (DNB)
… system managed to produce the desired outcome of bubble growth in a desired location as well as run with the PIV system showing good prospect in the intended use of the experimental set up.</p>
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Ebulição nucleada em placa plana horizontal com baixos fluxos de calor
… and high speed film is used to register bubble growth. ln order to explain the phenomenon a theoretical model for the heat transfer mechanism is proposed which considers that in nucleate boiling still part of heat is transfered by free convection. No attempt is made in order to determine …
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Modeling of Air-Assisted and Flash Boiling Sprays in Gasoline Direct Injection Engines
… in future GDI engines. Moreover, the simplified bubble growth model can be applied to the simulation of bubbly flows in many applications ranging from nuclear reactor coolant safety to refrigeration systems.
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Bubble dynamics in polymeric foams
… of fluid viscoelasticity on the expansion of gas bubbles in polymer foams for both non-reactive and reactive polymers are investigated. Polymer foams are used extensively in consumer products, from car parts to upholstery. They are produced either by injection moulding (of non-reactive polymeric …
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Modeling of Multicomponent Fuel Vaporization in Internal Combustion Engines
… These two phenomena were modeled using a bubble-droplet system. A description was formulated to predict bubble growth and was verified using experiment data. Both the breakup due to aerodynamical force and the breakup due to bubble expansion are considered. The formulated method combined …
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Fundamentals of microlayer evaporation and its role on boiling heat transfer enhancement
… of the process is still lacking. The bubble ebullition cycle (nucleation, growth and departure) happens over a very short time-span (milliseconds) making it challenging to study the near-surface interfacial characteristics of a single bubble, which involves a microlayer. The microlayer …
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Fission gas transport and its interactions with irradiation-induced defects in lanthanum doped ceria
… microstructures with dislocation loops, voids or bubbles, and dislocation networks at higher doses. The Burgers vectors of the dislocation loops were determined and the loops were found to be mainly [111] type Burgers vector pure edge loops. They have been tentatively identified as interstitial …
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Experiments In Pool Boiling Heat Transfer And Nucleationdynamics Of High Pressure Refrigerants
… to capture the thermal response was needed. At bubble frequencies of 30 nucleations per second, it was necessary for the camera to have much higher frame rates. Through the use of two synchronized cameras, the surface temperature, position, size and shape of the bubbles were recorded …
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Model study of Tuyere erosion in refining
… with time has also been determined.The final bubble contact radius has been found to be influenced by the high gas momentum and kinetic energy which promote erosion, as such lateral erosion which is the erosion due to the washing or spreading effect of the bubble growth also depends on these, …
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Model study of Tuyere erosion in refining
… with time has also been determined.The final bubble contact radius has been found to be influenced by the high gas momentum and kinetic energy which promote erosion, as such lateral erosion which is the erosion due to the washing or spreading effect of the bubble growth also depends on these, …
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