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swirl inlet velocity for a 2-d axisymmetric flow |
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January 10, 2015, 07:41 |
swirl inlet velocity for a 2-d axisymmetric flow
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#1 |
New Member
zahra rashidi
Join Date: Dec 2014
Posts: 9
Rep Power: 11 |
hi every body,
I have used blockmesh to create a wedge type mesh for an axisymmetric vortextube . i want to do an axisymmetric simulation with a swirl flow at the inlet,and i have some questions: 1-as u khow the equations will be different with the cartesian coordinate because of existence of swirl,does the code change them into correct one or i shuld change them myself?! 2-if i want to use "swirlFlowRateInletVelocity"in oF derived b.c, it just enter a swirl mass flow normal to boundary!but in my case the flow have both tangentional and radial velocity too,it means the swirl is not normal to boundary ,how can i intruduce the swirl flow that have radial velocity too as a B.C at inlet?! the B.C of my case( 2-d axisymmetric) in inlet is: { mass flow rate:0.2184 kg/s tngentional velocity:200 m/s radial velocity:90 m/s} I appreciate all your views and answers to these |
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January 11, 2015, 03:02 |
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#2 |
New Member
zahra rashidi
Join Date: Dec 2014
Posts: 9
Rep Power: 11 |
no body can't help me?
please speak about your idea. |
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January 12, 2015, 08:01 |
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#3 |
Senior Member
Nima Samkhaniani
Join Date: Sep 2009
Location: Tehran, Iran
Posts: 1,267
Blog Entries: 1
Rep Power: 25 |
Dear Zahra
1-could you please define your question much precisely, equations are written and solved in Cartesian coordinate, what changes do you want to apply to them? 2- if you have the value of vector velocity , why dont you apply velocity vector directly at inlet like that: Code:
type fixedValue; value uniform (Ux,Uy,Uz);
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