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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 72 for “"friction factor"”.
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A correlation for relating the friction factor in curved pipe to the friction factor in a straight length of pipe
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1960
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Evaluation Of Thermophysical Properties, Friction Factor And Heat Transfer Of Alumina Nanofluid Flow In Tubes
… showed that its viscosity is higher by a factor of 1.25 to 10.24 than the viscosity of water. Also the measurements of the viscosity of different volume concentration of Al2O3/water nanofluid showed that, the viscosity decreases as the volume concentration decreases. The plot between the …
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Use of blood oxygenator membrane units in teaching mass balances, friction factor and mass transfer analysis
… data produces a correlation between the Fanning friction factor and Reynolds number of f = 8.1/Re^0.12 instead of predicted f = 16/Re and manufacturer's data of f = 17.8/Re^0.89. A mass transfer correlation from dissolved oxygen concentrations was developed using the dimensionless Reynolds, …
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HYDRODYNAMIC CHARACTERISTICS AND COAL COMBUSTION MODELING OF A HIGH VELOCITY FLUIDIZED BED (SOLIDS FRICTION FACTOR, TWO PHASE FLOW, PRESSURE PROFILE, FAST)
… and solids fraction to obtain a better solids friction factor equation than available in the literature. A computer program has been developed to predict the static pressure of every point in the LFB. The computer program predictions and the static pressure data show good agreement. Coal …
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The determination of the friction factor for new 6-inch aluminum tubing and head loss in elbows and sprinkler-pipe couplers
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Agricultural Engineering, 1950
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Improvements to the Cheng-Todreas wire-wrapped rod bundle friction factor correlation in response to pin number and in the transition flow region
… flow, and a change to the transition region friction factor equation. Both changes, when implemented, offer slight improvements to the overall accuracy and precision of the Cheng-Todreas Pressure Drop Correlation..
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An investigation of the simultaneous effect of diameter, velocity, temperature, and specific gravity upon the friction factor in Fanning's equation for the flow of water in pipes
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Business and Engineering Administration, 1922.
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Performance Evaluation of the Three Dimensional Woven Copper Matrix as Heat Exchanger
… An open circuit is built to determine the friction factor and number of transfer units of the specimen. Air is passed through the woven mesh. The mesh is heated and the pressure drop across the mesh is noted. The functional form of the friction factor and the number of transfer units is …
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Towards Estimating Friction Factors of Mine Drifts from Low Density Point Clouds
… widespread use in underground mines, namely, the friction factor. As the mining ventilation field moves towards the use of simulations and more refined models, a simple and efficient method for extracting the friction factor is needed. This thesis proposes new LiDAR-based methods for estimating …
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Investigation and characterization of pressure drop in evenly spaced twisted tapes
… was to create a correlation for the Darcy's friction factor as a function of the Reynolds number (Re), tape twist ratio (y), and tape spacing (s) which could be used for both Ferroni's work and other future work. To characterize developing flow, 6 test sections were constructed. Measurements …
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Uma equação para o cálculo do atrito entre fases em escoamentos turbulentos estratificados em tubulações circulares
… there are several methods to calculate friction pressure losses in such processes. These methods involve friction factors, parameters that depend on flow conditions and fluid property. The interfacial friction factor represents the friction tension generated from the interaction between …
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Experimental Validation of an Ejector Ramjet Solver at High Entrainment Conditions
… used a fully developed turbulent flow friction factor, and the other where the friction factor calculations accounted for flow development from the entrance of the mixing tube. From the experimental data ejector performance parameters of entrainment and compression ratios were …
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Flow Characteristics and Heat Transfer for Pressure and Electric Field Driven Laminar Flow With Temperature-Dependent Properties in a Pipe With Irregular Cross Section
… it has only a minor effect on axial velocity and friction factor.
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Design of compact intermediate heat exchangers for gas cooled fast reactors
… reactor core. In particular, the wavy channel friction factor and the effective conduction thickness between channels were evaluated by simulations using state of the art software (FluentTm). To support the competitiveness of the PCHE, it was directly compared to other potential IHX candidates …
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Modelling of disturbed flow regimes in aspirated pipe systems
… for smoke entering a given hole, using a Time Factor algorithm. Dilution of the smoke due to mixing and due to the induction of fresh air from other holes is taken into account. The disturbance also causes a local increase in the friction factor that affects the downstream pressure drop for at …
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Thermal-hydraulic analysis of cross-shaped spiral fuel in high power density BWRs
… However, this results in a CSS-bundle turbulent friction factor which is only 90% of the expected value given its hydraulic diameter. The effect of twist pitch on this pressure drop and friction factor is negligible in the range of twists examined.
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Analysis of Interfacial Processes on Non-Wetting Surfaces
… slip length and, in turn, drag reduction and friction factor on structured non-wetting surfaces. Secondly, by combining the solution for effective slip length on structured non-wetting surfaces and the fractal characterization of generic multiscale rough surfaces, a theoretical analysis of …
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Convective heat transfer in rotating, circular channels
… developing flow in circular tubes and by friction factor correlations for fully developed flow in circular tubes rotating at constant angular velocity about an orthogonal axis. The data show heat-transfer enhancement for increasing rotational speeds, as predicted through secondary flows …
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Computational fluid dynamics modelling of fluid flow inside fractured reservoirs.
… rough fracture models to develop two fracture friction-factor models in realistic fractured media conditions (analytical and numerical friction-factor models). These accounted for the effect on entire fracture domain flow of both rough fracture geometry effects and also matrix permeability. …
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Evaluation of the thermal-hydraulic operating limits of the HEU-LEU transition cores for the MIT Research Reactor
… Two correlations were used to model the friction pressure drop and enhanced heat transfer of the finned fuel plates: the Carnavos correlation for friction factor and heat transfer, and the Wong Correlation for friction factor with a constant heat transfer enhancement factor of 1.9. With …
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