Global ETD Search
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 32 for “"Horizontal flow"”.
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Convection and the dynamics of large-scale horizontal flow.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1974.
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Cryogenic Modeling of the Heat Transferred by Combined Convection From a Vertical Cylinder in a Horizontal Flow
… convection from a vertical cylinder in a horizontal flow. Reynolds numbers above 5 x 10('5), with Grashof numbers above 10('11), were achieved in a cryogenic heat transfer tunnel which was constructed for this research.
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Impact of Biochar Amendment, Hydraulic Retention Time, and Influent Concentration on N and P Removal in Horizontal Flow-Through Bioreactors
… five-day trials on twelve laboratory-scale, horizontal flow-through DNBR columns. Three media types were tested: woodchips (W), 90% woodchips and 10% biochar (B10), and 70% woodchips and 30% biochar (B30). Simulated agricultural drainage with four unique concentration combinations of 16.1 and …
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The influence of gravity on pressure drop and heat transfer in flow boiling
… pressure drop, and vapor volume fraction in flow boiling of R11 can be studied in vertical upflow, vertical downflow, and horizontal flow configurations.
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Appropriate technology water treatment processes for MaeLa Temporary Shelter, Thailand
This thesis recommends the use of horizontal-flow roughing filters to treat spring water of variable annual quality in MaeLa Temporary Shelter, Thailand. The public drinking water system for 45,000 refugees is overseen by Aide Medicale Intemacionale, with which this project was conducted. Half the …
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The primary structures and fabrics of the upper mantle and lower oceanic crust from ophiolite complexes
… events are the remnants of mantle asthenospheric flow at an oceanic spreading centre which have been fossilised into the lithospheric mantle at the asthenosphere-lithosphere boundary. This fossilisation occurs during the offaxis, dominantly horizontal, flow of the asthenosphere. A study of the …
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The void fraction in headers of microchannel heat exchangers
… fraction in headers. This study first presents flow regimes and void fraction in horizontal and vertical round smooth tubes ID 7 mm with R134a in the adiabatic conditions (saturation temperature at 33 ºC) and low mass flux (40-150 kg/m2s for horizontal tubes and 65-115 kg/m2s for vertical …
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ΑΣΤΑΘΗΣ ΡΟΗ ΤΟΥ ΥΠΟΓΕΙΟΥ ΝΕΡΟΥ ΣΕ ΚΕΚΛΙΜΕΝΑ ΥΔΡΟΦΟΡΑ ΣΤΡΩΜΑΤΑ ΜΕ ΠΕΠΕΡΑΣΜΕΝΑ ΣΤΟΙΧΕΙΑ
… SOLUTION OF UNSTEADY TWO-DIMENSIONAL GROUNDWATER FLOW OVER SLOPINGBEDS BY A FINITE ELEMENT MODEL. THE GOVERNING EQUATIONS HAVE BEEN OBTAINED BY TWO WAYS. FIRST, THE DIFFERENTIAL EQUATION BASED ON THE ASSUMPTION OF NEARLY HORIZONTAL FLOW IS DERIVED, VALID FOR SMALL ANGLES OF INCLINATION. NEXT, THE …
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Numerical simulation of a single wafer atomic layer deposition process
… experimental reactor consist of a warm wall horizontal flow tube, a single disc mounted halfway down the tube, and an alternating cycle flow between a reactant gas and a wash in a carrier gas. The process is governed by the desire to achieve a uniform coating on the substrate layer. …
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The prediction of flow patterns, liquid holdup and pressure losses occurring during continuous two-phase flow in horizontal pipelines
Two 1700-foot field test flowlines, one a two inch I.D. line and the other a four inch I.D. line, were constructed and leveled for the purpose of studying continuous, two-phase, horizontal flow. Each flowline was equipped with two pairs of "quick closing" valves by means of which the liquid holdup …
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Development of capacitive sensor to determine void fraction in horizontal and vertical tubes
This study first presents flow regimes and void fraction in horizontal and vertical tubes with R134a in the adiabatic condition and low mass flux range. Visualization results of horizontal flow patterns are compared to Wojtan-Ursenbacher-Thome flow regime map and have a good agreement. Both void …
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THUNDERCLOUD ELECTRIC FIELD SOUNDINGS WITH INSTRUMENTED FREE BALLOONS
… maximum vertical wind component of about 15m/s. Horizontal flow, at 10-15m/s towards the northeast, was encountered above 7000m (msl). The behavior of the electric vector indicated that the balloon rose through an 800m thick region of positive charge in the lower portion of the cloud. Above this, …
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Quantifying the contribution of bank storage due to an alteration in stream stage
… Results show bank storage is dominated by horizontal flow through the alluvial aquifer and thus water movement is highly sensitive to floodplain stratigraphy. Also, the highly engineered river system of the middle Rio Grande valley has resulted in the diminished capacity of the floodplain …
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Ambient noise tomography for wavespeed and anisotropy in the crust of southwestern China
… combined effects of weakened rock mechanism and horizontal flow in the deep crust of southeastern Tibet. The northern part of the Central Yunnan block, which geographically coincides with the inner zone of the Emeishan flood basalt, reveals relatively higher wavespeeds than the surrounding …
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Solutions for the flows induced by lazy, forced and pure turbulent plumes
… is employed to predict and gain insight into the flows induced by turbulent plumes and jets above slender horizontal slots, in otherwise quiescent uniform environments. To supplement the solutions, the effect on the environment of a plume driven by an off-source supply of buoyancy was also …
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Aquifer Characterization in the Blue Ridge Physiographic Province
… for predominantly downward vertical and limited horizontal flow. Fracture density is depthà limited and correlated with proximity to topographic lineaments. Current models consider the porous regolith as the primary water storage reservoir for the entire aquifer system. In this research, detailed …
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Effects of flow orientation on condensation in tubes
… of annular condensation of FC-72 in vertical downflow, vertical upflow and horizontal flow as well as the effects of channel orientation on flow condensation. Two separate condensation test modules are employed, one for high-speed video imaging of the film interface and the second for heat …
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The hydrodynamics of the water hammer energy system
… technology capable of working efficiently in low flow speed (< 2 m/s) conditions. This research was conducted to identify, design and develop a device capable of generating pico scale power (< 1 kW) in shallow water, low input tidal and river conditions. The result is the Water Hammer Energy …
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Response of suction caissons in soft clay under vertical and horizontal loading for tidal energy converter applications
… be strongly correlated to the tidal current’s flow characteristics. The TEC’s function and the tidal current’s flow characteristics provide a unique set of loading conditions when compared to traditional offshore energy structures for oil and gas. First, the vertical dead weight of the …
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Dense-phase pneumatic transport of cohesionless solids
… mm internal diameter circulating unit with both horizontal and vertical sections has been constructed . The pipe material is transparent lexan which allows for visual observation of the flow pattern. The particles used were a mixture of 95% white and 5% black polyethylene granules (particle …
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