2 edition of Thermocapillary convection of intermediate Prandtl number fluid in floating zone configuration found in the catalog.
Thermocapillary convection of intermediate Prandtl number fluid in floating zone configuration
Thesis (M.A.Sc.) -- University of Toronto, 2001.
|Series||Canadian theses = -- Thèses canadiennes|
|The Physical Object|
|Pagination||2 microfiches : negative.|
Convection Heat Transfer Reading Problems → , , , , , , → , , , , Introduction • in convective heat transfer, the bulk ﬂuid motion of the ﬂuid plays a major role in the over- all energy transfer process. Therefore, knowledge of the velocity distribution near a solid. estimated the effect of wall conduction on natural convection flow of micropolar fluids along a flat plate. Helmy  discussed the state space approach to unsteady free convection flow of a micropolar fluid. Chang  approached numerically the simulation of the natural convection plume about a line heat source in micropolar fluid.
The quality of large semiconductor crystals grown from the melt for use in electronic and optoelectronic devices is strongly influenced by the intricate coupling of.  D. Schwabe, P. Hintz, and S. Flank, New features of thermocapillary convection in floating zone revealed by tracer particle accumulation structure (PAS), Microgravity Sci. Technol. 9, ,
Free Convection 16 Transition to Turbulence Transition in a free convection boundary layer depends on the relative magnitude of the buoyancy and viscous forces in the fluid. It is customary to correlate its occurence in terms of the Rayleigh number. Ø Rayleigh Number: () . The reading rooms at the TIB Conti-Campus site are open to a limited number of people Monday to Friday from to ; all other TIB sites and reading rooms remain closed. We are still here for you online and by telephone, and our digital services and TIB document delivery are available as usual.
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Investigation of micro-gravity effects on heat pipe thermal performance and working fluid behavior
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His major research interests are the numerical studies of thermocapillary flow instability in half zone configuration and heat and mass transfer process in crystal growth systems on ground and in microgravity, such as floating zone method and Bridgman method.
He has authored more than 20 article publications on microgravity fluid by: Instability of Marangoni convection in floating zones (full zone configuration) of a low Prandtl number fluid under microgravity conditions is investigated by parallel supercalculus and direct three-dimensional and time-dependent simulation of the problem.
A parametric analysis (still absent in literature) of the influence of the aspect ratio of the liquid column on the features of the three Cited by: P. Parmentier, V. Regnier, and G. Lebon. Buoyant-thermocapillary instabilities in medium-Prandtl-number fluid layers subject to a horizontal temperature gradient.
Int. Heat Mass Trans (). CrossRef zbMATH Google Scholar. This paper presents a series of three-dimensional numerical simulations on thermocapillary convection of moderate Prandtl number (Pr = ) fluid in a shallow annular pool heated from the inner cylinder with surface heat dissipation.
The aspect ratio and radius ratio of the annular pool are respectively fixed at ε = and η = Cited by: 1. The mechanism of thermocapillary convection in a liquid bridge of high Prandtl number under. zero gravity is investigated. The key parameters used are as follows: Pr 50, Ma.We.
15, t. TK, b. Diameter of the top and bottom disks is. D mm.and the aspect ratio (HD /) is A numerical study has been done to analyze the effect of first mode of vibration on sub-critical thermocapillary convection in a floating zone liquid bridge of high Prandtl number fluid.
Steady and oscillatory thermocapillary flows of high Prandtl number fluids in the half-zone configuration are analyzed theoretically. Scaling analysis is performed to determine the velocity and length scales of the basic steady flow. The predicted scaling laws agree well with the numerically computed results.
Numerical simulations on thermocapillary convection of low Pr number molten tin under uniform magnetic field have been conducted under microgravity. The Navier-Stokes equations coupled with the energy conservation equation are solved on a staggered grid, and the free surface is captured by using the level set method.
The present results show that the transverse uniform magnetic field can. M. Levenstam, G. Amberg, C. WinklerInstability of thermocapillary convection in a half-zone at intermediate Prandtl numbers Phys. Fluids, 13 (), pp. Google Scholar.
Wang, D. Wu, L. Duan, and Q. Kang, “ Ground experiment on the instability of buoyant-thermocapillary convection in large-scale liquid bridge with large Prandtl number,” Int.
Heat Mass Transfer– (). Thermocapillary Convection of Intermediate Prandtl Number Fluid in noating Zone Configuration M. A Sc., Sirnic Sanja Department of Chernical Engineering & Applied Chernistry University of Toronto ABSTRACT The effects of surface evaporation on the onset of oscillatory themcapiilary convection in half floating zones were studied expetimentally.
Yang, S., et al.: Oscillating characteristic of free surface from stability to instability of thermocapillary convection for high Prandtl number fluids. Int. Heat Fluid F – () CrossRef Google Scholar.
Convection in a compressible fluid with infinite Prandtl number - Volume 96 Issue 3 - Gary T. Jarvis, Dan P. Mckenzie. Large prandtl number finite-amplitude thermal convection with maxwell viscoelasticity. Geophysical & Astrophysical Fluid Dynamics, Vol. 22, Issue. p.
In contrast with Kamotani et al. () who used a silicone oil with Prandtl number Pr in their experiment, we used the silicone oil with the lowest viscosity ( cSt. Especially sensitive to the inclination angle is the heat transport in low-Prandtl-number fluids and confined geometries.
The purpose of the present work is to investigate the global flow structure and its influence on the global heat transport in inclined convection in a cylindrical container of diameter-to-height aspect ratio $\unicode[STIX. convection was recently given for a range of Prandtl numbers from to in (Xiaohua, ).
Tesso and Piva (Pesso and Piva, ) recently calculated the low Prandtl natural convection in a square cavity, caused by large differences in the working fluid, characterised by the Gay-Lussac number (Ga) in addition to the Ra and Pr.
However, the presence of thermocapillary convection improves the stability of the flow and delays transitions to the oscillatory regime.
Behniat et al. conducted a numerical study that combines buoyancy convection and thermocapillary convection in a three-dimensional cubic enclosure with material free surface having a Prandtl number equal to 7. Laminar and Turbulent Flow . Laminar Flow: Smooth uninterrupted flow determined by a low Reynolds Reynolds number for a Newtonian fluid is defined as: = where D is a characteristic diameter (such as the diameter of a cylindrical pipe), v is the fluid velocity, is the density, and is the (dynamic) viscosity.
There are several other ways of writing it as well (based on volumetric. Chen, Xun L., "Thermocapillary convection and solidification in rectrangular cavities" (). Thermal convection in a volumetrically heated, infinite Prandtl number fluid with strongly temperature‐dependent viscosity: Implications for planetary thermal evolution.
Grasset. Search for more papers by this author. Parmentier. Search for more papers by this author. The Prandtl-number dependence of the first critical Reynolds number Re for intermediate Prandtl c1 Authors numbers was calculated by Levenstam et al.
. Winkler, C.: Instabilities of thermocapillary convection in a half-zone at intermediate Prandtl numbers, Phys. Fluids, vol. 3, pp. – ().  dependent modelling of the.Bénard-Marangoni convection with inclined temperature gradient was carried out in .
In this study, the authors used a cylindrical container of 50 mm diameter with silicone oil layer thickness ranging from mm to 2 mm and Prandtl number (Pr =, and ) at 25 ° C as working fluids. They found various patterns, such as.This work presented a series of three-dimensional unsteady numerical simulations on the characteristics of the mixed oscillation flows of binary mixture in a Czochralski crystal growth model.
The silicon-germanium melt is investigated and the capillary ratio is minus one. The simulation results showed that, for the special capillary ratio, the thermal and solutocapillary forces are imposed in.