EFFECT OF TUBE BUNDLE LAYOUT ON KETTLE REBOILER USING EULERIAN MULTIPHASE CFD SIMULATION

2016 ◽  
Author(s):  
Kevin J. Farrell
Keyword(s):  
Cfd Simulation ◽  
Tube Bundle ◽  
Multiphase Cfd

Experiment and multiphase CFD simulation of gas-solid flow in a CFB reactor at various operating conditions: Assessing the performance of 2D and 3D simulations

2020 ◽  
Vol 37 (12) ◽  
pp. 2094-2103
Author(s):  
Mukesh Upadhyay ◽  
Myung Won Seo ◽  
Parlikkad Rajan Naren ◽  
Jong-Ho Park ◽  
Thanh Dang Binh Nguyen ◽  
...  
Keyword(s):  
Cfd Simulation ◽  
Operating Conditions ◽  
Solid Flow ◽  
3D Simulations ◽  
Multiphase Cfd ◽  
2D And 3D

scholarly journals Numerical investigation of flow distribution in tubular space of fin-and-tube heat exchanger

2018 ◽  
Vol 240 ◽  
pp. 02011
Author(s):  
Tomasz Stelmach
Keyword(s):  
Heat Exchanger ◽  
Numerical Investigation ◽  
Cfd Simulation ◽  
Tube Bundle ◽  
Cross Flow ◽  
Flow Distribution ◽  
Volumetric Flow Rate ◽  
Tube Heat Exchanger ◽  
Ansys Cfx ◽  
Measurement Results

This paper presents the experimental and numerical investigation of flow distribution in the tubular space of cross-flow fin-and-tube heat exchanger. The tube bundle with two rows arranged in staggered formation is considered. A standard heat exchanged manifold, with inlet nozzle pipe located asymmetrically is considered. The outlet nozzle pipe is located in the middle of the outlet manifold. A developed experimental setup allows one to measure volumetric flow rate in heat exchanger tubes using the ultrasonic flowmeters. The measurement results are then compared with CFD simulation in ANSYS CFX code using the SSG Reynolds Stress turbulence model, and a good agreement is found for tube Re numbers varied from 1800 to 3100.

scholarly journals Optimizing hydraulic reservoirs using euler-eulerlagrange multiphase cfd simulation

2020 ◽  
Author(s):  
Lukas Muttenthaler ◽  
◽  
Bernhard Manhartsgruber ◽  
Keyword(s):  
Cfd Simulation ◽  
Multiphase Cfd

Unsteady Isothermal Flow Through a Staggered Tube Bundle Array

2012 ◽  
Author(s):  
Artit Ridluan ◽  
Surasing Arayangkun ◽  
Coochart Phayom
Keyword(s):  
Reynolds Number ◽  
Unsteady Flow ◽  
Cfd Simulation ◽  
Transient Flow ◽  
Stokes Equations ◽  
Tube Bundle ◽  
Separation Bubble ◽  
Reynolds Numbers ◽  
Isothermal Flow ◽  
Flow Through

Two-dimensional Unsteady simulations of isothermal flow through a staggered tube bundle array at three different Reynolds numbers 54, 72, and 90 were investigated. The Navier-Stokes equations are numerically solved. Based on the CFD simulation results, the unsteady flow patterns were developed behind the rear row of the array, while for the other rows, the steady separated and reattached flow behaviors were observed, small, short, and closed separation bubble behind the rods. At Reynolds Number of 54, the transient flow was perfectly periodic. The complicated patterns of unsteady flow could be observed at Reynolds numbers of 72 and 90. The shedding patterns of vortices from the last rods were different and no longer periodic as found at Reynolds number of 54. The degree of chaos is increased as Reynolds number progressed.

Multiphase CFD Simulation of Flow Inside Liquid Seal Drums of the Refinery Flare System

2011 ◽  
Vol 51 (2) ◽  
pp. 1073-1082
Author(s):  
Randheer Yadav ◽  
Amitkumar Parekh ◽  
Ajay Gupta ◽  
Asit Kumar Das
Keyword(s):  
Cfd Simulation ◽  
Liquid Seal ◽  
Multiphase Cfd

LES CFD Simulation of Unsteady Fluid Forces in Tube Bundle

2011 ◽  
Author(s):  
Serge Delafontaine ◽  
Guillaume Ricciardi ◽  
Bruno Collard
Keyword(s):  
Fuel Assembly ◽  
Cfd Simulation ◽  
Tube Bundle ◽  
Operating Conditions ◽  
Fluid Forces ◽  
Assembly Design ◽  
Nuclear Fuel Assembly ◽  
Flow Induced Vibrations ◽  
Cycle Lengths ◽  
Unsteady Fluid

Significant nuclear fuel assembly design innovations are regularly incorporated to meet the highest expectations in terms of safety, performance and flexibility. Despite the continuous upgrades of fuel designs and materials, the fuel failure rate has not markedly decreased during the last decade, partly because of higher burn-up, longer cycle lengths, mixed cores… Safety aspects give rise to the reduction of contamination and the fuel cladding represents the first containment barrier. It is then necessary to maintain its integrity under all operating conditions. Flow-induced vibrations of fuel rods generating grid-to-rod fretting are the dominant fuel leaker mechanism worldwide. This paper presents a Computational Fluid Dynamics (CFD) simulation of the flow around a fuel rod. The swirls generated by the mixing vanes are reproduced, and the corresponding resulting fluid force excitations are extracted. The computed spectra are compared to envelop spectra obtained by tests on fuel assembly mock-ups in our experimental facilities.

Comparison of CFD Simulation and Simplified Modeling of a Fluidized Bed CO2 Capture Reactor

2016 ◽  
Vol 14 (1) ◽  
pp. 133-141 ◽  
Author(s):  
Daoyin Liu ◽  
Zhonglin Zhang ◽  
Yaming Zhuang ◽  
Xiaoping Chen
Keyword(s):  
Fluidized Bed ◽  
Flow Model ◽  
Cfd Simulation ◽  
Plug Flow ◽  
Fluidized Bed Reactors ◽  
Cfd Model ◽  
Two Phase ◽  
Multiphase Cfd ◽  
Reactor Models ◽  
Dem Model

AbstractCO2 capture using solid sorbents in fluidized bed reactors is a promising technology. The multiphase CFD model is increasingly developed to study the reactors, but it is difficult to model all the realistic details and it requires significant computational time. In this study, both the multiphase CFD model (i.e., CFD-DEM model coupled with reaction) and the simplified reactor models (i.e., plug flow model and bubbling two-phase model) are developed for modeling a fluidized bed CO2 capture reactor. The comparisons are made at different gas velocities from fixed bed to fluidized bed. The DEM based model reveals a detailed view of CO2 adsorption process with particle flow dynamics, based on which the assumptions in the simplified models can be evaluated. The plug flow model predictions generally show similar trends to the DEM model but there are quantitative differences; thus, it can be used to determine the reactor performance limit. The bubbling two-phase model gives better predictions than the plug flow model because the effect of bubbles on the inter-phase mass transfer and reaction is included. In the future, a closer combination of the multiphase CFD simulation and the simplified reactor models will likely be an efficient design method of CO2 capture fluidized bed reactors.

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