نتایج جستجو برای: shell side computational fluid dynamics cfd modeling

تعداد نتایج: 1443387  

Journal: :Macromolecular Reaction Engineering 2022

Two different modeling approaches are applied in this work to the simulation of fluidized bed reactors containing solid particles Geldart A-B type and operated at typical conditions for polyolefins production. On one side, a fully detailed computational fluid-dynamics (CFD) model is developed, considering 2D planar geometry multi-fluid description with kinetic theory granular flows. other, conv...

2008
Qingyan Chen Zhao Zhang Wangda Zuo

This paper gave an overview of the past and present applications of various Computational Fluid Dynamics (CFD) methods for indoor environment modeling. Typical applications used the CFD to calculate airflow, air temperature, contaminant concentrations, and turbulence in enclosed environment for studying or designing thermal comfort and indoor air quality. With simple airflow and geometry, the C...

2014
Michael Van Schyndel Gabriel A. Wainer

Computational Fluid Dynamics (CFD) deals with computing the equations of fluid flows using numerical methods instead of partial differential equations. The Discrete-Event System specification (DEVS) theory has already been used to approximate various continuous systems by applying a quantized state system approach. In this research, we experiment with a new method: using Cell-DEVS theory to cre...

In this study, detailed fluid flow and heat transfer in cooling plates of polymeric membrane fuel cell is studied using computational fluid dynamics (CFD) techniques. The performances of four different coolant flow field designs were compared in terms of the maximum surface temperature, temperature uniformity and pressure drop characteristics. The results indicate that the porous flow field wit...

2002
Bin Xia Da-Wen Sun

Computational fluid dynamics (CFD) is a simulation tool, which uses powerful computer and applied mathematics to model fluid flow situations for the prediction of heat, mass and momentum transfer and optimal design in industrial processes. It is only in recent years that CFD has been applied in the food processing industry. This paper reviews the application of CFD in food processing industries...

2006
MINGCHUN LUO

This paper examines the effect of various combustion models when predicting the environment in a building arising from fire in a room. The use of a stoichiometric combustion model will usually over-predict the efficiency of the combustion process in the fuel-rich areas and hence over-predict the temperature field. A modified combustion model presented in this paper can improve the predicted res...

2003
Stephen D. Hall Tracie J. Barber

A benchmark turbulent Backward Facing Step (BFS) airflow was studied in detail through a program of tightly coupled experimental and CFD analysis. The theoretical and experimental approaches were developed simultaneously in a “building block” approach and the results used to verify each “block”. Information from both CFD and experiment was used to develop confidence in the accuracy of each tech...

2016
João Silva F. Marques da Silva António Couto Ana Estanqueiro

The assessment of wind energy resource for the development of deep offshore wind plants requires the use of every possible source of data and, in many cases, includes data gathered at meteorological stations installed at islands, islets or even oil platforms—all structures that interfere with, and change, the flow characteristics. This work aims to contribute to the evaluation of such changes i...

2013
BINGZHI LI

Deposits can affect the in-furnace wall surface temperature in a Kraft recovery furnace. In CFD (Computational Fluid Dynamics) models of the Kraft recovery furnace, the wall surface temperature is frequently used as the heat-transfer boundary condition. Therefore, the effect of deposits must be taken into account in CFD models. In this work, CFD simulations of a Kraft recovery furnace were perf...

2007
Liangzhu Wang Qingyan Chen

Current multizone airflow network models assume air momentum effects, contaminant concentrations and air temperatures are uniformly and homogeneously distributed in a zone of a building. These assumptions can cause errors for zones where air and/or contaminant are not well mixed. A coupled multizone-CFD program has been developed to improve the multizone model by applying a CFD model to those p...

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