Investigation the Dependency of Surface Tension to Density and Temperature at Dense Systems

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Alizadeh Osgooei, Hanieh | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40265 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Parsafar, Gholamabbas
Abstract:
In this thesis heat transfer coefficient and temperature distribution of two Non-Newtonian and a Newtonian fluids in stirred vessel are investigated using Computational Fluid Dynamic (CFD). This vessel is agitated with new impeller called MAXBLEND. Non-Newtonian fluids are aqueous solutions of carboxymethyl cellulose 1.5%w/w and xanthan gum 3% w/w and Newtonian fluid is glycerin. This vessel is simulated in laminar regime with Reynolds number less than 14. The results of simulation are compared with correlation proposed by Kawase et al.
Furthermore as a new research for this impeller, the effects of vessel diameter and position of impeller in the vessel on heat transfer coefficient are investigated by CFD. Average temperature distribution in vessel height and radius for different impeller velocity and diameter are obtained and plotted. These results show that fluid temperature in agitated vessel with MAXBLEND impeller is approximately constant except close to the wall of the vessel, also the increasing of impeller velocity and decreasing of vessel diameter increase heat transfer coefficient.
Keywords:
State Equation ; Linear Isotherm Regularity ; Surface Tension ; Density ; Intermolecular Potential

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