scholarly journals CFD simulation and analysis of a gas to water two-phase closed thermosyphon-based heat exchanger

2014 ◽  
Author(s):  
J. B. Ramos
Keyword(s):  
Heat Exchanger ◽  
Cfd Simulation ◽  
Two Phase

CFD Simulation Analysis of Pressure Drop in a Vertical Helical-Coil Heat Exchanger

2012 ◽  
Vol 562-564 ◽  
pp. 1095-1098
Author(s):  
Ning Jiang ◽  
Jia Li
Keyword(s):  
Heat Exchanger ◽  
Pressure Drop ◽  
Cfd Simulation ◽  
Simulation Analysis ◽  
Steel Tube ◽  
Stainless Steel Tube ◽  
Helical Coil ◽  
Two Phase ◽  
Coil Heat Exchanger ◽  
Coil Heat

The pressure drop in a helical-coil heat exchanger is studied. The helically coiled tube with a coil pitch of 1080 mm and coil diameter of 950 mm is fabricated by bending a stainless steel tube of 8m length and 15.6 mm inner diameter. The total height of the helix tube is 2.8 m. The concerned range of mass flow rate for two-phase flow is 25-100 kg/m2s. Computational fluid dynamics (CFD) simulation analysis of pressure drop in the vertical helical-coil heat exchanger is carried out.

Two-Phase Refrigerant Distribution in a Parallel-Flow Heat Exchanger

2010 ◽  
Vol 17 (1) ◽  
pp. 59-75 ◽  
Author(s):  
Nae-Hyun Kim ◽  
D. Y. Kim
Keyword(s):  
Heat Exchanger ◽  
Parallel Flow ◽  
Two Phase ◽  
Flow Heat

A bi-directional two-phase/two-phase heat exchanger

1993 ◽  
Author(s):  
JENTUNG KU ◽  
LAURA OTTENSTEIN
Keyword(s):  
Heat Exchanger ◽  
Two Phase

scholarly journals CFD Simulation of Solid Suspension for a Liquid–Solid Industrial Stirred Reactor

2021 ◽  
Vol 11 (12) ◽  
pp. 5705
Author(s):  
Adrian Stuparu ◽  
Romeo Susan-Resiga ◽  
Alin Bosioc
Keyword(s):  
Chemical Reaction ◽  
Cfd Simulation ◽  
Simulation Analysis ◽  
Solid Phase ◽  
Initial Conditions ◽  
Chemical Reactor ◽  
Liquid Mixtures ◽  
Multiphase Model ◽  
Chemical Product ◽  
Two Phase

The present study examines the possibility of using an industrial stirred chemical reactor, originally employed for liquid–liquid mixtures, for operating with two-phase liquid–solid suspensions. It is critical when obtaining a high-quality chemical product that the solid phase remains suspended in the liquid phase long enough that the chemical reaction takes place. The impeller was designed for the preparation of a chemical product with a prescribed composition. The present study aims at finding, using a numerical simulation analysis, if the performance of the original impeller is suitable for obtaining a new chemical product with a different composition. The Eulerian multiphase model was employed along with the renormalization (RNG) k-ε turbulence model to simulate liquid–solid flow with a free surface in a stirred tank. A sliding-mesh approach was used to model the impeller rotation with the commercial CFD code, FLUENT. The results obtained underline that 25% to 40% of the solid phase is sedimented on the lower part of the reactor, depending on the initial conditions. It results that the impeller does not perform as needed; hence, the suspension time of the solid phase is not long enough for the chemical reaction to be properly completed.

scholarly journals Two-phase CFD simulation of the monodyspersed suspension hydraulic behaviour in the tank apparatus from a circulatory pipe

2008 ◽  
Vol 10 (1) ◽  
pp. 22-27 ◽  
Author(s):  
Roch Plewik ◽  
Piotr Synowiec ◽  
Janusz Wójcik
Keyword(s):  
Cfd Simulation ◽  
Fluidised Bed ◽  
Cfd Simulations ◽  
Two Phase ◽  
Hydraulic Behaviour ◽  
Hydraulic Conditions ◽  
The One ◽  
Cfd Method ◽  
Multi Phase ◽  
The Ideal

Two-phase CFD simulation of the monodyspersed suspension hydraulic behaviour in the tank apparatus from a circulatory pipe The hydrodynamics in fluidized-bed crystallizers is studied by CFD method. The simulations were performed by a commercial packet of computational fluid dynamics Fluent 6.x. For the one-phase modelling (15), a standard k-ε model was applied. In the case of the two-phase flows the Eulerian multi-phase model with a standard k-ε method, aided by the k-ε dispersed model for viscosity, has been used respectively. The collected data put a new light on the suspension flow behaviour in the annular zone of the fluidised bed crystallizer. From the presented here CFD simulations, it clearly issues that the real hydraulic conditions in the fluidised bed crystallizers are far from the ideal ones.

Efficiency of a Combined Desalination and Power System Utilizing a Two-Phase Flow Multistream Heat Exchanger

2016 ◽  
Vol 38 (11-12) ◽  
pp. 1000-1007 ◽  
Author(s):  
Alireza Hosseini Araghi ◽  
Mehdi Khiadani ◽  
Kamel Hooman ◽  
Gordon Lucas
Keyword(s):  
Heat Exchanger ◽  
Power System ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase
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