[pakk]

Thank you for you answers, but I was trying to ask something different...

You said that the results you got were wrong. This means two things:
* You got something on your screen;
* You expected something else in you head.

So my questions are:

1. What did you see on your screen after you did your 'failed' simulation?
2. What did you expect in your head.

[oozcan]

Sorry for the late answer. I was busy

[QUOTE=pakk;618483]Thank you for you answers, but I was trying to ask something different...

You said that the results you got were wrong. This means two things:
* You got something on your screen;
* You expected something else in you head.

Yes, I agree with that.

No, no there is nothing to be misunderstood actually I have to thank you for helping me out with CFD.

1) As I said, I saw that faces having wall BC conditions could not change with temperature. Because wall BCs has constant temperatures. That's why they could not change with time or on iteration manner. Problem I ask is here. Actually those faces need to act as complete cell zone temperature.

2) That's why the thing I expect is to see temperature change in those faces like other faces. So, it must be given initial temperature in those trivial faces (wall BC faces) and Hence, they will change with time and iterationally.

[oozcan]

[QUOTE=pakk;618483]Thank you for you answers, but I was trying to ask something different...

You said that the results you got were wrong. This means two things:
* You got something on your screen;
* You expected something else in you head.

it could be perfect temperature distribution. But bottom face is wall BC and constant temperature (trivial face) it need to act like cell zone initial temperature. That's why I ask it. Is there any method to give initial temperature in wall BCs

[oozcan]

[QUOTE=Bruno Machado;618474]

Originally Posted by oozcan

DEFINE_PROFILE = BC

DEFINE_INIT = initial condition

there are thousands of examples either on the manual or on internet.

Hi again,

I am still reading something, those wall BCs will be given initial temperature (t=0). For example t=0, T=323.15K, temperature will change as well as flow trough. DEFINE_INIT is the most proper ? right?

[pakk]

What do you want to describe on the walls? I can give many interpretations to what you are saying... The two most likely:

Interpretation A:
The walls should be given an initial temperature, and afterwards the temperature should not be constant but Fluent should calculate what the temperature is.

Interpretation B:
The walls should be given an initial temperature, and afterwards the temperature should not be constant but should change in a way that you know.

[oozcan]

Originally Posted by pakk

What do you want to describe on the walls? I can give many interpretations to what you are saying... The two most likely:

Interpretation A:
The walls should be given an initial temperature, and afterwards the temperature should not be constant but Fluent should calculate what the temperature is.

Interpretation B:
The walls should be given an initial temperature, and afterwards the temperature should not be constant but should change in a way that you know.

Intepretation A is correct.

Actually those faces are not wall, but I have to give those faces some named selections. Thus, I have to give them wall. Then, now, those wall BCs need to act like its cell zone. But ı dont know how those faces (wall BCs) react (cooling down or heating up) in transient simulation

That is, I have no prediction how those faces (wall BCs) act/react/

[oozcan]

[QUOTE=pakk;618559]What do you want to describe on the walls? I can give many interpretations to what you are saying... The two most likely:

Interpretation A:
The walls should be given an initial temperature, and afterwards the temperature should not be constant but Fluent should calculate what the temperature is.

So,

First attahed image shows that those faces are constant temperature during time that I have defined. because of having wall BC

Second image is to show how solid material has temperature distribution. I need to see like this at least.

[pakk]

Then it might be that you are just looking for the 'no flux' boundary condition.

In the boundary condition of you wall (I know it is not made of stones and so, but it is just a name), go to "thermal", and select "heat flux", and set "Heat flux (w/m2)" to zero.

[oozcan]

Originally Posted by pakk

Then it might be that you are just looking for the 'no flux' boundary condition.

In the boundary condition of you wall (I know it is not made of stones and so, but it is just a name), go to "thermal", and select "heat flux", and set "Heat flux (w/m2)" to zero.

It was already 0,

there is ''thermal conditions'' in wall tab.
Heat flux=0 (adiabatic)
convection (heat transfer coeff.=0 and free stream =300) (there is no interface, that's why there is no heat transfer), the thing I want to be
Temperature = 323.15K (constant), here is the answer

That's why, temperature is constant in all process or during time.

[pakk]

Originally Posted by oozcan

It was already 0,

there is ''thermal conditions'' in wall tab.
Heat flux=0 (adiabatic)
convection (heat transfer coeff.=0 and free stream =300) (there is no interface, that's why there is no heat transfer), the thing I want to be
Temperature = 323.15K (constant), here is the answer

That's why, temperature is constant in all process or during time.

It is not clear to me if you understand this, but you have a heat flux condition OR a fixed temperature condition OR a convection condition (OR Radiation OR mixed).

So set the "thermal condition" on "Heat flux". Then you will no longer see a constant temperature.

[Bruno Machado]

sorry to say that, but before trying to solve your problem, you gotta grab a book and learn about boundary condition. Neumann, dirichlet and robin boundary condition. looks like you are trying to solve something you don't understand, and randomly trying things. invest some time reading about it, and i am sure you wont even need our help to solve what you want.