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February 18, 2015, 09:38 |
Cut a Cylinder and Rotating it.
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#1 |
New Member
Ghady Deeb
Join Date: Nov 2014
Location: Lebanon
Posts: 19
Rep Power: 12 |
My project is to compare the Temperature and Velocity Distribution in Full cylinder and a Cylinder cut 10% from the original, while rotating.
Based on the Energy Equation, we prove that the Temperature distribution doesn't depend on the Velocity. And we showed this in our simulation: For many angular velocity, the temperature distribution was always the same. Now, we cut the cylinder (10% of its radius), and we want to show that it's not like in case 1; But here and based on the energy equation, Reynolds and Prandtl and theta are parameters in this case. So for different angular Velocities we should have different Temperature distribution. But my problem that I run the second case and i found that the temperature distribution is the same as the full disk (Case 1). I think Maybe my BC is not correct. Problem Description: R1=0.033 m R2=0.0297m Density of the fluid inside the cylinder = 1000; Mu = 0.001731; I want Reynolds to be equal to = 1000; So i calculated the V from: Re= (ro)(V)(R)/(Mu); abd I took R = (R1+R2)/2 Where V=0.05521 Which is = (omega)*R; So Omega = 1.76125 rad/s. Now What I selected in the BC. Rotating Wall 1: Translation, V=0.05521 Rotating Wall 2: Rotation, Omega=1.76125 Both R.W are at Cte Temperature of 274.15 K Wall 1 and 2: Roataion, Omega=1.76125 With Both Walls have h=0 (Heat Flux) Thanks in Advance. |
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