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.
Results
Showing 1 to 20 of 153 for “"Convective heat transfer."”.
-
Convective heat transfer in rotating, circular channels
… ~1-4 and Reynolds numbers Re ~1,000-2,000. The heat-transfer model is first validated according to Nusselt number correlations for laminar, developing flow in circular tubes and by friction factor correlations for fully developed flow in circular tubes rotating at constant angular velocity about …
-
Multiphase Microfluidics for Convective Heat Transfer and Manufacturing
… interfacial forces for manufacturing and enhance convective heat transfer. These systems have application in drug delivery, biological and chemical micro-reactors, and electronics cooling. First, fluid-fluid interfaces can be used for the generation of particles. At the interface between two …
-
Mathematical Modeling of Convective Heat Transfer in Mammoth Cave
<p>Around two centuries ago, changes were made to the entrances of Mammoth Cave and its passages. Today the Historic Entrance to Mammoth Cave is enlarged and the passage just beyond the entrance known as Houchins' Narrows has been cleared of rubble and filled with sediments. These enlargements have …
-
Visualising convective heat transfer in a propagating wildland fire
… and emergency response. While radiative heat transfer has traditionally been emphasized in bushfire modelling, recent studies reveal the significant role of convective heat transfer, especially in fine porous fuels. This thesis investigates the complex contributions of convective heating …
-
Enhanced Laminar Convective Heat Transfer using Microstructured Superhydrophobic Surfaces
… have been studied in depth, but the effects on heat transfer are largely unknown. The primary goal of this research effort was to explore the effects of slip flow on laminar convective heat transfer resulting from micropatterned, superhydrophobic surfaces. The first step toward achieving the …
-
The Enhancement of Convective Heat Transfer in an Aluminum Oxide Nanoaerosol
… (Al2O3) nanoparticles in air on the rate of convective heat transfer. The particle mass loading was varied over a range of flow Reynolds number. The results indicate up to a 36% increase in Nusselt number for a particle mass loading of 0.35% at a Reynolds number of 6,000. The enhanced heat …
-
A numerical study of convective heat transfer in stored respiring agricultural produce
… in which local temperature dependent respiration heat generation occurs. In the numerical investigations conducted, both adiabatic and isothermal boundary conditions are considered for the cooling and storage process. The influence of size, respiration rate and permeability on natural convection …
-
Convective Heat Transfer in a Moving Bed with Special Reference to Melting
… solids in packed beds in the accepted manner of heat transfer factor or Nusselt number against Reynolds number. it was recognised that melting in a tower furnace was restricted to a short zone at the bottom so, to simplify the problem, Akers (2) simulated the upper zone under moving bed …
-
Forced convective heat transfer to supercritical water in micro-rocket cooling passages
An investigation of heat transfer to supercritical fluids in micro-channels was completed to assess the cooling characteristics of the MIT micro-rocket engine. Previous results from supercritical ethanol heat transfer tests were compared to water tests to establish a baseline for future fuel …
-
Studies of Convective Heat Transfer Coefficient Enhancement in Two-Phase, Non-Boiling Flow
… has been conducted to determine the heat transfer coefficient in a non-boiling, two-component, two-phase flow. Both upflow and downflow of air-water mixtures were studied in a 1 inch pipe. The superficial water velocities ranged from 0.40 to 3.24 m/s with the corresponding Reynolds …
-
Critical evaluation of anomalous thermal conductivity and convective heat transfer enhancement in nanofluids
… higher thermal conductivity and single-phase heat transfer coefficients than their base fluids. The possibility of very large thermal conductivity enhancement in nanofluids and the associated physical mechanisms are a hotly debated topic, in part because the thermal conductivity database is …
-
Reduction of convective heat transfer from reacting flows by application of electric fields
The electric field-induced reduction of heat transfer from a rod-stabilized diffusion flame and a step-stabilized premixed flame was investigated. The fuel examined was propane. Inlet velocity for the diffusion mode was a nominal value of 3.4 m/s with nominal air/fuel ratios of 420, 320, and 270. …
-
Laminar and turbulent convective heat transfer over bodies at an angle of attack
… methods for calculating laminar and turbulent heat transfer over bodies of revolution at angles of attack. These methods are restricted to hypersonic flows over bodies with highly cooled walls. A method is presented for determining the surface inviscid streamline geometry and coordinate scale …
-
Local instantaneous convective heat transfer characteristics from mechanical and supply pulsed radial reattaching nozzles
The heat transfer characteristics of combined mechanically and supply pulsated radial reattaching, CPRJR, nozzles were documented as a function of nozzle exit angle (0° and 20°), non-dimensional gap height (0.05 and 0.13), non-dimensional flow guide height (0.8 and 1.16), mechanical pulsation rate …
-
ENHANCEMENT OF CONVECTIVE HEAT TRANSFER IN INTERNAL FLOWS USING AN ELECTRICALLY-INDUCED CORONA JET
The enhancement of heat transfer by active and passive methods has been the subject of many academic and industrial research studies. Internal flows play a major role in many applications and different methods have been utilized to augment the heat transfer to internal flows. Secondary flows …
-
The unstructured grid incompressible Navier-Stokes algorithm for convective heat transfer based on artificial compressibility
… canonical test cases from the three regimes of convective heat transfer. The computed solutions are in close agreement with analytical solutions and other benchmark computations.
-
Specifics of forced-convective heat transfer to supercritical CO2 flowing upward in vertical bare tubes
Heat transfer in the forced convection regime of fluids at supercritical conditions has been studied extensively for the past 60 years. The dominant approach to summarize the experimental results was by proposing empirical correlations for the data within the investigated range of parameters. It …
-
Convective Heat Transfer in Quasi-one-dimensional Magnetic Fluid in Horizontal Field and Temperature Gradients
<p>In this work we studied the convective heat transfer in a magnetic fluid in both zero and applied magnetic fields. The natural convection is observed in a quasi-one dimensional magnetic fluid in a horizontal temperature gradient. The horizontal non-homogeneous magnetic fields were applied across …
-
A Numerical And Interferometric Study Of Natural Convective Heat Transfer From Divided And Undivided Vertical Channels
… on two-dimensional laminar natural convection heat transfer in an undivided and divided vertical isothermal channel. For the divided channel configuration, an isothermal plate at the same temperature as the channel walls was located on the channel centre line. The study examined the effect of …
Page 1 of 8