Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

Heat transfer to impinging isothermal gas and flame jets

https://seniordesign.engr.uidaho.edu/2006_2007/am2/experimental%20_and_numerical_study_of_pressure_drop_and_heat_transfer_in_a_single-phase_micro-channel_heat_sink.pdf

Experimental and numerical study of pressure drop and heat transfer in a single-phase micro-channel heat sink

Advanced models of fuel droplet heating and evaporation

Publisher Summary This chapter presents a discussion on jet impingement heat transfer. The chapter describes the applications and physics of the flow and heat transfer phenomena, available empirical correlations and values they predict, and numerical simulation techniques and results of impinging jet devices for heat transfer. The relative strengths and drawbacks of the Reynolds stress model, algebraic stress models, shear stress transport, and v 2 f turbulence models for impinging jet flow and heat transfer are compared in the chapter. The chapter provides select model equations as well as quantitative assessments of model errors and judgments of model suitability. The review of recent impinging jet research publications identified a series of engineering research tasks that are important for improving the design and resulting performance of impinging jets: (1) clearly resolve the physical mechanisms by which multiple peaks occur in the transfer coefficient profiles, and clarify which mechanism(s) dominate in various geometries and Reynolds number regimes, (2) develop a turbulence model, and associated wall treatment if necessary, that reliably and efficiently provides time-averaged transfer coefficients, (3) develop alternate nozzle and installation geometries that provide higher efficiency, meaning improved Nu profiles at either a set flow or set blower power, and (4) further explore the effects of jet interference in jet array geometries, both experimentally and numerically. This includes improved design of exit pathways for spent flow in array installations.

/pdf/jet-impingement-heat-transfer-physics-correlations-and-3h1zkpep1u.pdf

Jet Impingement Heat Transfer: Physics, Correlations, and Numerical Modeling

An experimental and analytical study of solidification of a binary mixture

An assessment of spectral radiative heat transfer predictions for a pulverized coal-fired furnace

Solute redistribution limit in coarsening dendrite arms during binary alloy solidification

In der Abhandlung wird der Einfluss magnetischer Felder auf den Energietransport in inkompressibler Couette-Stromung zwischen zwei sich relativ zueinander bewegenden ebenen Platten untersucht. Das aussere Magnetfeld wirkt senkrecht zur Stromungsrichtung und senkrecht zur Oberflache der Platten. Die beiden isothermen Platten emittieren und reflektieren diffus Warmestrahlung. Das Stromungsmedium ist isotrop und kann Warme absorbieren und emittieren. Die nicht lineare Integro-Differential-Energiegleichung ist naherungweise gelost. Die numerischen Ergebnisse zeigen den Einfluss der Hartmannschen Zahl und anderer dimensionsloser Kenngrossen auf die Temperaturverteilung und die Warmeubertragung.

Some considerations of radiation in magnetohydrodynamic Couette flow

Simultaneous melting and solidification of a phase-change material around two horizontal cylinders spaced vertically have been investigated experimentally. Experiments have been performed to examine the effects of the cylinder surface temperature difference and the spacing between the cylinders. The solid/liquid phase-change process has been clarified from observations of timewise variations in the solid/liquid interface, flow visualization, and measurement of temperature distributions in the phase-change material. The results show that the melt shape and the solid/liquid interface motion are very sensitive to the surface temperature of the lower cylinder and the spacing between the cylinders

Raymond Viskanta

Papers

An experimental and analytical study of solidification of a binary mixture

An assessment of spectral radiative heat transfer predictions for a pulverized coal-fired furnace

Solute redistribution limit in coarsening dendrite arms during binary alloy solidification

Some considerations of radiation in magnetohydrodynamic Couette flow

An experimental study of simultaneous melting and solidification around two horizontal, vertically spaced cylinders