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Showing 1 to 20 of 137 for “"Stirred Tank"”.
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Modeling and Simulation of Large Scale Stirred Tank
… at DWPF is an opaque sludge that is mixed in a stirred tank with glass frit particles and water to form slurry of specified proportions. </p><p>The DWPF mixing process is composed of a flat bottom cylindrical mixing vessel with a centrally located helical coil, and agitator. The helical coil is …
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Prediction of the hydrodynamics in stirred tank reactors
… to find a suitable set of model parameters for stirred tank reactors. In view of this, the present study investigated the performance of the standard k - ε model to predict the flow field in stirred tank reactors. The parametric analysis presented herein involves variation of the parameters in …
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Development of a CFD model for stirred tank applications
… with the development of a multi phase model for stirred tank applications. The general purpose, commercially available CFD code, FLUENT 6.2, is used to model a Rushton turbine-agitated stirred tank with T = 0.14 m.
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MULTIPHASE REACTION STUDIES IN STIRRED TANK AND FIXED BED REACTORS
A biphasic stirred tank reactor and a trickle bed reactor were studied to understand complex multiphase reactor behavior arising from mass transfer effects on reactions and to improve modeling accuracy for rational design and optimization.
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The Cascade Control of a Partially Simulated Continuous Stirred Tank Reactor
… and on a partially simulated continuous stirred tank reactor fitted with a cooling jacket. The system disturbance is a combination of step changes in the reactor inlet temperature and throughput and in the jacket coolant inlet temperature, while the jacket flowrate is the manipulated …
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Heat and mass transfer from particles suspended in a stirred tank,
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1967.
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Mixing of nanoparticles in a stirred tank in high pressure carbon dioxide
… through the nozzle, and this can achieved in a stirred tank. Study of the stirred mixing of nanoparticles in supercritical CO_2 is the main goal of this work. Binary suspension of silica/alumina and silica/titania powders with the average primary particle sizes 16 nm (silica). 13 nm (alumina), …
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Experimental and simulation studies of two-phase flow in a stirred tank
… models of air bubble dispersion in a standard stirred vessel with two types of impeller: Rushton turbine and 45⁰ pitched-blade turbine."--Introduction, page 4.
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Experimental determination of the mixing requirements for solid suspension in pharmaceutical stirred tank reactors
Glass and glass-lined, stirred-tank reactors are of significant importance in the pharmaceutical and related industries. Because of fabrication issues, a retreat blade impeller (RBI) with a low impeller clearance off the tank bottom is commonly used in glass-lined reactors, typically combined with …
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Simulation of palm oil and methanol mixing in stirred tank by implement a normal and fractal baffles
… concentrated on the simulation of two type of tank to compare between normal baffle and fractal baffle in mixing tank to get which one is the best of homogenizing. Approximations were made with respect to improving batch sizes, tank geometry, impeller type, baffle type, and placement and …
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Transient response of an imperfectly mixed continuous flow stirred tank reactor to an upset of inflow rate
Includes bibliographical references (pages 31-32).
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Preliminary investigation of growth and antimicrobial production by streptomyces polyantibioticus : from shake flask to stirred tank bioreactor
… and scale-up of the process into a laboratory stirred tank bioreactor (STR) was done in the present study. The work focused on obtaining growth kinetics and suitable operating conditions for cultivation. Characterisation of the growth profile of SPRT and determination of the kinetic growth …
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Experimental investigation of the fluid velocity distribution in stirred tank reactors equipped with retreat-blade impellers using laser doppler velocimetry
Stirred tank reactors are commonly used in the pharmaceutical industry for synthesis of Active Pharmaceutical Ingredients (API's) and their intermediates. Typically, these vessels are glass-lined and are provided with a single retreat-blade glass-lined impeller and a single baffle. Despite their …
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Minimum agitation speed for solid suspension and mixing time in a torispherical -bottomed pharmaceutical stirred tank under different baffling conditions
… in this work for a glass-lined type of mixing tank provided with a torispherical bottom and agitated with a retreat-blade impeller under different baffling configurations. Ns for the same tank but equipped with a different agitation system, namely an axial impeller, was also experimentally …
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Novel experimental method for the determination of the minimum agitation speed for solids suspension in flat-bottomed stirred tank reactors
… to suspend finely divided solids in vessels stirred by an impeller is a critical parameter to properly operate industrial tanks in a large number of industrial operations. The most common experimental approach to measure N_{js} is that of Zwietering’s (Chem. Eng. Sci., 1958, 8, 244-253), …
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Experimental and computational study of non-turbulent flow regimes and cavern formation of non-Newtonian fluids in a stirred tank
When non-Newtonian fluids are mixed in a stirred tank at low Reynolds numbers caverns can be formed around the impeller. If the fluid contains a yield stress the cavern has a fixed boundary where no flow occurs outside of it. When the fluid does not contain a yield stress a pseudo-cavern is formed, …
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