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Topics - mali28

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I want to get time-average velocity profiles in a transient simulation. Fluent only gives me the results for a particular time step. But how can I get the time average values for a specified delta t?

Please help.


When I compile the UDF I get the following error:

Error: open_udf_library: The system cannot find the path specified

Please help.

Hello all,

Error: divergence detected in AMG solver: pressure correction---what does this mean and how do I fix the problem?

Please help me sort it out.


Fluent / What is DPM concentration in Fluent and how is it calculated?
« on: February 02, 2012, 05:30:45 PM »

I am confused about this term DPM concentration. What does it actually means because it gives very low concentration value when I plot the DPM concentration graph. What is the unit of this term can any one tell me?

Thank you in advance.

Fluent / Coordinates of discrete phase in lagrangian approach using UDF
« on: January 30, 2012, 06:19:17 PM »

Can I get x, y, z coordinates of all the particle moving in a continuous phase using UDF during the iteration. The particles are tracked using lagrangian approach.

Thank you.

Fluent / Stochastic vs Cloud tracking?
« on: January 20, 2012, 06:52:21 PM »
Can anyone tell me the difference between stochastic and cloud tracking?

Thank you.

Fluent / Fluent UDF for calculating heat loss from a composite wall
« on: January 15, 2012, 12:08:37 PM »

I have a cylindrical geometry with fluid flowing inside. The inside surface has a layer of deposits. Then I have a metal wall. The metal wall is insulated. So I have three resistances. Fluent does not offer heat loss through a composite wall so I have to use UDF to calculate heat loss through it. I can do it by defining constant wall heat flux and using a profile defined by UDF. But I don't know much about UDF coding.

Can someone help me with this?

See below the composite wall figure attached. The geometry is cylindrical.

Thank you.

Fluent / How to calculate geometry diameter using UDF
« on: January 14, 2012, 09:58:01 PM »

I have a geometry with varying diameter along the column height. I want to specify heat loss condition because the wall is insulated. For that, I need to calculate the overall heat transfer coefficient first. For that I need the inside diameter of the column as well. Since the diameter is not constant throughout the geometry, I have to find a way of calculating the distance from the centre of geometry up to the wall using UDF.

Any help will be highly appreciated.

Thank you.

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