Absorption and Evaporation Mass Transfer Simulation of a Droplet by Finite Volume Method and SIMPLEC Algorithm

2011 ◽  
Vol 110-116 ◽  
pp. 4315-4323
Author(s):  
S. Torfi ◽  
S.M. Hosseini Nejad
Keyword(s):  
Mass Transfer ◽  
Finite Volume Method ◽  
Finite Volume ◽  
Equations Of Motion ◽  
Superheated Water ◽  
Mass Ratio ◽  
Solvent Vapor ◽  
Simplec Algorithm ◽  
Temperature Constant ◽  
Volume Method

In this paper, a numerical model is developed to simulate single droplet heat and mass transfer in a two-pieces solution with a saturated solvent vapor environment. Finite volume method and transient SIMPLEC algorithm in spherical coordinates system used for simulation. For simulation of the mass transfer, dimensionless equations of motion, heat transfer and mass transfer (based on mass ratio) are solved simultaneously. All the thermodynamic and transitional solution properties have been considered as a function of temperature and concentration. Verification of method is done by compare these numerical results with analytical and numerical analysis of other studies. Evaporation, absorption and condensation contours in a water droplet at uniform temperature at superheated water vapor and Distribution of Droplet's Surface Temperature, Constant Temperature and concentration lines as the modeling results are presented. The results are shown that 0.5% increase of concentration of droplet cause increase 8 degree C of mean temperature of droplet.

Fluid Pattern and Optimum Design of Sump Based on CFD

2012 ◽  
Author(s):  
Li Cheng ◽  
Chao Liu
Keyword(s):  
Finite Volume Method ◽  
Optimum Design ◽  
Finite Volume ◽  
Turbulence Model ◽  
Safe Operation ◽  
Common Criteria ◽  
Design Values ◽  
Simplec Algorithm ◽  
Flow Through ◽  
Volume Method

The open sump is a typical inlet passage for small to middle-sized pumping station. It is important for the efficiency and safe operation of pumps that the open sump has an optimum design. The flow through the sump and into the pump is calculated using CFD. The incompressible N-S equations are solved by the finite volume method. The RNG k-ε turbulence model and the SIMPLEC algorithm for pressure-velocity coupling are used. Many different designs for the open sump are considered, the results of which are compared based on common criteria to evaluate the sump performance. Design values for the width, the depth of submergence and the bellmouth shape are derived.

scholarly journals Simulation of mass transfer in a river with dead zones using network simulation method

2019 ◽  
Vol 23 (Suppl. 6) ◽  
pp. 1917-1927
Author(s):  
Atousa Ataieyan ◽  
Seyed Ayyoubzadeh ◽  
Abdolreza Nabavi ◽  
Salvador Gomez-Lopera ◽  
Gennaro Sepede
Keyword(s):  
Mass Transfer ◽  
Finite Volume Method ◽  
Finite Volume ◽  
Network Simulation ◽  
Simulation Method ◽  
Mountain Stream ◽  
Dead Zones ◽  
Coupled Equations ◽  
Volume Method ◽  
Network Simulation Method

In this study, network simulation method is applied to solve a 1-D solute transfer problem governed by transient storage model in a mountain stream including dead zones. In this computational method, for each node of the discretized domain, the terms of governing equation are substituted by the equivalent electrical devices which are connected to each other based on Kirchhoff?s current law. Finally, the total electric circuit is solved using an appropriate electrical code to obtain the unknown value at the nodes. Because no analytical solutions for this model have been presented so far, to verify network simulation method, the problem is solved by finite volume method, as well. According to the results, estimations made by network simulation method and finite volume method are in good agreement. Further, network simulation method is easier in implementation, especially in implementation of boundary conditions, and faster than finite volume method in computation. Therefore, in the case of 1-D mass transfer problems with a set of coupled equations, network simulation method is recommended to be used as an efficient alternative to numerical methods.

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