CFD simulation of mixing in tall gas–liquid stirred vessel: Role of local flow patterns

Khopkar, Avinash R.; Kasat, Gopal R.; Pandit, Aniruddha B.; Ranade, Vivek V.

doi:10.1016/j.ces.2005.09.023

Cited by 82 publications

(42 citation statements)

References 16 publications

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“…(8), this formulation has a wide range of application and has been used by many authors [3,7,9,13,24,25].…”

Section: Interfacial Momentum Transfermentioning

confidence: 99%

“…Relatively few attempts [6,7,9,25] have been made to understand the influence of prevailing turbulence on drag coefficient in stirred tanks. They all attempted to relate the influence of turbulence on drag coefficient to the characteristic spatial scale of prevailing turbulence, which is a promising development to be briefly discussed below.…”

Section: Influence Of Turbulencementioning

confidence: 99%

See 1 more Smart Citation

Sensitivity Study on Modeling an Internal Airlift Loop Reactor Using a Steady 2D Two‐Fluid Model

Huang

Yang

et al. 2008

Chem Eng & Technol

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The sensitivity study of bubbly flow in an internal airlift loop reactor is presented using a steady Reynolds averaging two-fluid model. Comparative evaluation of different drag formulations, drag coefficient correlations, turbulence effect on the drag coefficient, outlet slip velocity, and bubble size is performed and the respective influence to the simulation results is highlighted. It is found that a complicated drag formulation may not result in reliable predictions. All the drag coefficient correlations underpredict the gas holdup if the influence of turbulence on the drag coefficient is not well incorporated. Fortunately, the global hydrodynamics is not sensitive to the outflow slip velocity for a wide range, so a steady two-fluid model can be used to simulate the bubbly flow when the flow field is fully developed. The correct estimation of bubble size with properly selected correlations play an important role in successful simulation of gas-liquid bubbly flow in airlift loop reactors.

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“…(8), this formulation has a wide range of application and has been used by many authors [3,7,9,13,24,25].…”

Section: Interfacial Momentum Transfermentioning

confidence: 99%

Section: Influence Of Turbulencementioning

confidence: 99%

Sensitivity Study on Modeling an Internal Airlift Loop Reactor Using a Steady 2D Two‐Fluid Model

Huang

Yang

et al. 2008

Chem Eng & Technol

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“…Natural convection in porous or fluid filled enclosures has received considerable attention due to its importance in many engineering systems, such as materials processing (casting, sintering, and etching), growing crystals, catalytic reactors, environmental management of organic waste, cooling of electronic units, solar energy collector, to name just a few (Lauriat and Prasad, 1987;Goyeau et al, 1996;Patwardhan et al, 2003;Costa, 1999Costa, , 2003Khopkar et al, 2006;Basak et al, 2007;Ganguli et al, 2007;Zhao et al 2006Zhao et al , 2007aZhao et al ,b, 2008aLiu et al 2008a,b). To achieve better performance of materials processing and other systems or equipments involving natural convection flow, it requires profound knowledge of fluid/porous and heat/species transports, upon which appropriate strategies could be implemented.…”

Section: Introductionmentioning

confidence: 95%

Inverse determination of boundary heat fluxes in a porous enclosure dynamically coupled with thermal transport

Zhao

Liu

Tang

2009

Chemical Engineering Science

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“…For the momentum equations are concerned in the , , and directions of expression such as (3) to (5) and are shown below:…”

Section: Governing Equationsmentioning

confidence: 99%

“…The quality of products is influenced by the act of fermenting throughout the manufacturing process [4]; if it fails during the manufacturing process, the products will end up being unsatisfactory, discordant in quality, or unbalanced in constituents, which will not match up with our expectation. It is also necessary for fermenting tank throughout the process considering convectional circulation, and diffusion [5,6]. Also, there are some common requirements of fermentation process which are determined by characteristics of products.…”

Section: Introductionmentioning

confidence: 99%

Flow and Stress Field Analysis of Different Fluids and Blades for Fermentation Process

Wang

Cheng

Liu

et al. 2014

Advances in Mechanical Engineering

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Fermentation techniques are applied for the biotechnology and are widely used for food manufacturing, materials processing, chemical reaction, and so forth. Different fluids and types of blades in the tank for fermentation cause distinct flow and stress field distributions on the surface between fluid and blade and various flow reactions in the tank appear. This paper is mainly focused on the analysis of flow field with different fluid viscosities and also studied the stress field acting on the blades with different scales and shapes of them under specific rotational speed. The results show that the viscosity of fluid influences the flow field and stress distributions on the blades. The maximum stress that acts on the blade is increased with the increasing of viscosity. On the other hand, the ratio of blade length to width influences stress distributions on the blade. At the same time, the inclined angle of blade is also the key parameter for the consideration of design and appropriate inclined angle of blade will decrease the maximum stress. The results provide effective means of gaining insights into the flow and stress distribution of fermentation process.

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CFD simulation of mixing in tall gas–liquid stirred vessel: Role of local flow patterns

Cited by 82 publications

References 16 publications

Sensitivity Study on Modeling an Internal Airlift Loop Reactor Using a Steady 2D Two‐Fluid Model

Sensitivity Study on Modeling an Internal Airlift Loop Reactor Using a Steady 2D Two‐Fluid Model

Inverse determination of boundary heat fluxes in a porous enclosure dynamically coupled with thermal transport

Flow and Stress Field Analysis of Different Fluids and Blades for Fermentation Process

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