Characterization of Bubble Size and Gas Hold up in OBCs - Assignment Example

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The paper "Characterization of Bubble Size and Gas Hold up in OBCs " explains how the author plotted the graph entrainment fraction vs particle size in his simulation, simulated power intensity and a number of tanks in his numerical work, and set up physics in cfx-pre to set up the power intensity…

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Characterization of Bubble Size and Gas Hold up in OBCs

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Subject: Information Technology
Type: Assignment
Level: Undergraduate
Pages: 1 (250 words)
Downloads: 3
Author: sandracremin

Extract of sample "Characterization of Bubble Size and Gas Hold up in OBCs"

The three planes I chose are at the top of the OBC column seen in the figure. The first plane is the top plane of the OBC while the other two are 50 mm spaced apart. Here I plotted the particle distribution in CFD Post and then averaged the particle distribution histograms to obtain the results. Then I plotted the air volume fraction and determined the overall volume of the cylinder it was in (the cylinder lies between the planes mentioned earlier). This provided me with an accurate description of how much air each cylinder between the planes contained.

I used to plot the entrainment fraction. 3. How did you simulate power intensity and the number of tanks in your numerical work? where did you get the data from? --> Power intensity is directly related to the average sinusoidal velocity of the OBC. Anderson (2009) has not used fixed OBCs. Instead, he has relied on a moving cage and given it the power to simulate power intensity. I have tackled this issue by varying the input velocity function for the inlet water. As far as the number of tanks is concerned, please see equation (2) and Hydrodynamic Characterization in Anderson (2009) for a full explanation.

Simply put, the number of tanks model is connected to the overall power intensity function that can be manipulated to give an integer value. I used that with expression to give me the values in CFD Post.I took power intensity values from CFD Post and then used equation (2) from Anderson (2009) to calculate the number of tanks required. Then I plotted these against each other using Excel.Can you explain how did you set up physics in cfx-pre to set up the” power intensity versus recovery for different sparger sizes”, as well as “particle size against entrainment fraction” and “power intensity versus the number of tanks”?

These things are obtained from the CFX Post area and not CFX Pre. Power intensity is essentially about increasing or decreasing the inlet water’s velocity to produce a certain range of power intensity. The particle size against entrainment fraction is explained above along with power intensity and a number of tanks.

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