[ssixr]

Hello friends, i am working on transient thermal analysis using ansys solver. Lot of time takin to format the input data itself than simulation. Friends, Is it possible to feed the case/data file of fluent or cfx directly into ansys software for thermal or structural analysis? Any macros available for conversion? If so it ll be very helpful.... Thank you.

[emreg]

yes... any help?

[ssixr]

hello emreg,
Could you kindly explain me the procedure to feed the data available from cfd analysis directly to ansys thermal/structural solver? so far i am interpolating the cfd data to feed into ansys which is time consuming and possibility of human error is more.thank you...

sudhir

[karthickeyan]

It is possible in ansys 12.0 and greater version easily and also in lower version
u can write an result file in report option for ansys

[ssixr]

Hi karthick, i am using ansys 13....whether procedure to import case and data files to ansys is similar to importing any cad files or is it different? If so plz explain be the steps. Thank you. Sudhir

[emreg]

Fluid-Structure Interaction (FSI) - One Way Transfer

This feature enables you to import fluid forces, temperatures, and convections from a steady-state or transient CFD analysis into a Mechanical application analysis.
This one way transfer of face forces (tractions) at a fluid-structure interface allows you to investigate the effects of fluid flow in a static or transient structural analysis. Similarly the one way transfer of temperatures or convection information from a CFD analysis can be used in determining the temperature distribution on a structure in a steady-state or transient thermal analysis or to determine the induced stresses in a structural analysis.
To import loads from a CFD analysis:
In the Project Schematic, add an appropriate analysis with data transfer to create a link between the solution of a CFD analysis and the newly added analysis.
Attach geometry to the analysis system, and then double-click Setup to open the Mechanical window. An Imported Load folder is added under the Environment folder, by default.
To add an imported load, click the Imported Load folder to make the Environment toolbar available or right mouse click on the Imported Load folder and select the appropriate load from the context menu.
On the Environment toolbar, click Imported Load, and then select an appropriate load.
Select appropriate geometry, and then click Apply.
Select appropriate options in the Details view.
Under Transfer Definition,
For surface transfer, click the CFD Surface list, and then select the corresponding CFD surface.
For volumetric transfer, click the CFD Domain list, and then select the corresponding CFD Domain.
For CFD Convection loads only: Select the appropriate Ambient Temperature Type.

Note:
CFD Near-Wall Ambient (bulk) Temperature (default): This option uses the fluid temperature in the near-wall region as the ambient temperature for the film coefficient calculation. This value will vary along the face.
Constant Ambient Temperature: This constant value applies to the entire scoped face(s). The film coefficient will be computed based on this constant ambient temperature value. Use of a constant ambient temperature value in rare cases may produce a negative film coefficient if the ambient temperature is less than the local face temperature. If this is the case, you can define a Supplemental Film Coefficient. This value will be used in place of the negative computed film coefficient and the ambient temperature adjusted to maintain the proper heat flow.
Under Data View, select the Source Time, for the imported load. The Source Time Step value changes based on the source time you select. If the selected source time corresponds to more than one source time step, you will also need to select the desired time step value. You can also change the Analysis Time and specify Scale and Offset values for the imported loads.
In the Project tree, right-click the imported load, and then click Import Load to import the load. When the load has been imported successfully, a contour plot will be displayed in the Geometry window.
After the solution is complete, a CFD Load Transfer Summary is displayed as a Comment in the particular CFD load branch. The summary contains the following information:
For a CFD Pressure load: the net force, due to shear stress and normal pressure, on the face computed in CFD and the net force transferred to the Mechanical application faces.
For a CFD Temperature load: For surface transfers - the average computed temperature on the CFD boundary and the corresponding average mapped temperature on the Mechanical application faces.
For volumetric transfers – the average, maximum, and minimum temperature of the CFD domain and the corresponding Mechanical Application body selection(s).
For a CFD Convection load: the total heat flow across the face, and the average film coefficient and ambient temperature on the face.
The computed and mapped face data may be compared in order to get a qualitative assessment of the accuracy of the mapped data. The following is an example of a CFD Load Transfer Summary for a CFD Pressure load.


Note:
The force values shown in the CFD Load Transfer Summary should only be used as a qualitative measure of the load transferred from CFD to the Mechanical application mesh. In the example above, the closer the CFD Computed forces are to the Mechanical application Mapped Forces, the better the mapping. The actual force transferred to the Mechanical application is reflected in the reaction forces.

[karthickeyan]

sorry i couldnt get u. u cannot import cas and data file in ansys. u can do it in fluent only...it is similar u can use import option to import. if u need to get the fluent data in ansys. in work space u open both fluent and ansys and drag solution form fluent and drop setup in ansys.

Originally Posted by ssixr

Hi karthick, i am using ansys 13....whether procedure to import case and data files to ansys is similar to importing any cad files or is it different? If so plz explain be the steps. Thank you. Sudhir

[ssixr]

hi emreg,
thanks for that brief about FSI in workbench. but i am using mechanical apdl solver. Could you be kind enough to explain me a method which will be used to export surface data from fluent to ansys mechanical solver?........thank you once again...
sudhir

Originally Posted by emreg

Fluid-Structure Interaction (FSI) - One Way Transfer

This feature enables you to import fluid forces, temperatures, and convections from a steady-state or transient CFD analysis into a Mechanical application analysis.
This one way transfer of face forces (tractions) at a fluid-structure interface allows you to investigate the effects of fluid flow in a static or transient structural analysis. Similarly the one way transfer of temperatures or convection information from a CFD analysis can be used in determining the temperature distribution on a structure in a steady-state or transient thermal analysis or to determine the induced stresses in a structural analysis.
To import loads from a CFD analysis:
In the Project Schematic, add an appropriate analysis with data transfer to create a link between the solution of a CFD analysis and the newly added analysis.
Attach geometry to the analysis system, and then double-click Setup to open the Mechanical window. An Imported Load folder is added under the Environment folder, by default.
To add an imported load, click the Imported Load folder to make the Environment toolbar available or right mouse click on the Imported Load folder and select the appropriate load from the context menu.
On the Environment toolbar, click Imported Load, and then select an appropriate load.
Select appropriate geometry, and then click Apply.
Select appropriate options in the Details view.
Under Transfer Definition,
For surface transfer, click the CFD Surface list, and then select the corresponding CFD surface.
For volumetric transfer, click the CFD Domain list, and then select the corresponding CFD Domain.
For CFD Convection loads only: Select the appropriate Ambient Temperature Type.

Note:
CFD Near-Wall Ambient (bulk) Temperature (default): This option uses the fluid temperature in the near-wall region as the ambient temperature for the film coefficient calculation. This value will vary along the face.
Constant Ambient Temperature: This constant value applies to the entire scoped face(s). The film coefficient will be computed based on this constant ambient temperature value. Use of a constant ambient temperature value in rare cases may produce a negative film coefficient if the ambient temperature is less than the local face temperature. If this is the case, you can define a Supplemental Film Coefficient. This value will be used in place of the negative computed film coefficient and the ambient temperature adjusted to maintain the proper heat flow.
Under Data View, select the Source Time, for the imported load. The Source Time Step value changes based on the source time you select. If the selected source time corresponds to more than one source time step, you will also need to select the desired time step value. You can also change the Analysis Time and specify Scale and Offset values for the imported loads.
In the Project tree, right-click the imported load, and then click Import Load to import the load. When the load has been imported successfully, a contour plot will be displayed in the Geometry window.
After the solution is complete, a CFD Load Transfer Summary is displayed as a Comment in the particular CFD load branch. The summary contains the following information:
For a CFD Pressure load: the net force, due to shear stress and normal pressure, on the face computed in CFD and the net force transferred to the Mechanical application faces.
For a CFD Temperature load: For surface transfers - the average computed temperature on the CFD boundary and the corresponding average mapped temperature on the Mechanical application faces.
For volumetric transfers – the average, maximum, and minimum temperature of the CFD domain and the corresponding Mechanical Application body selection(s).
For a CFD Convection load: the total heat flow across the face, and the average film coefficient and ambient temperature on the face.
The computed and mapped face data may be compared in order to get a qualitative assessment of the accuracy of the mapped data. The following is an example of a CFD Load Transfer Summary for a CFD Pressure load.


Note:
The force values shown in the CFD Load Transfer Summary should only be used as a qualitative measure of the load transferred from CFD to the Mechanical application mesh. In the example above, the closer the CFD Computed forces are to the Mechanical application Mapped Forces, the better the mapping. The actual force transferred to the Mechanical application is reflected in the reaction forces.

[ssixr]

hello karthickeyan,
i was talking about importing cfd surface nodal loads to ansys mechanical apdl solver not workbench....if you know any methods to do this, please tell me....thank you.
sudhir

Originally Posted by karthickeyan

sorry i couldnt get u. u cannot import cas and data file in ansys. u can do it in fluent only...it is similar u can use import option to import. if u need to get the fluent data in ansys. in work space u open both fluent and ansys and drag solution form fluent and drop setup in ansys.

[albin91]

Mr i wanto ask ,, in ansys 12. output thermal expansion

[ssixr]

hi albin91
could you give more detail about your issue?

[albin91]

Information Pipe trombones loop :
Diameter Pipe = 1 1/2 ’’
Working pressure = 17,6 Bar
Temperature = 850 °C
Material =Super alloy metals 800 HT schedule 80
Fluide = natural gas and steam
Insulation = Ceramic Wool
Pipe length = 10’/feet
Type support = Saddle shoes Support

o element pipe for analysis thermal expansion

[ssixr]

hi albin91,
whats the problem?

[albin91]

Originally Posted by ssixr

hi albin91,
whats the problem?

the problem output thermal expansion

[diwakar]

Hey emreg,
Can you tell me if i import temperature from CFD analysis to Static structural and then apply some structural load like a rotational velocity to the body which has the imported temperature applied. Will it show combined stress results from the imported temperature and the rotational velocity?

Originally Posted by emreg

Fluid-Structure Interaction (FSI) - One Way Transfer

This feature enables you to import fluid forces, temperatures, and convections from a steady-state or transient CFD analysis into a Mechanical application analysis.
This one way transfer of face forces (tractions) at a fluid-structure interface allows you to investigate the effects of fluid flow in a static or transient structural analysis. Similarly the one way transfer of temperatures or convection information from a CFD analysis can be used in determining the temperature distribution on a structure in a steady-state or transient thermal analysis or to determine the induced stresses in a structural analysis.
To import loads from a CFD analysis:
In the Project Schematic, add an appropriate analysis with data transfer to create a link between the solution of a CFD analysis and the newly added analysis.
Attach geometry to the analysis system, and then double-click Setup to open the Mechanical window. An Imported Load folder is added under the Environment folder, by default.
To add an imported load, click the Imported Load folder to make the Environment toolbar available or right mouse click on the Imported Load folder and select the appropriate load from the context menu.
On the Environment toolbar, click Imported Load, and then select an appropriate load.
Select appropriate geometry, and then click Apply.
Select appropriate options in the Details view.
Under Transfer Definition,
For surface transfer, click the CFD Surface list, and then select the corresponding CFD surface.
For volumetric transfer, click the CFD Domain list, and then select the corresponding CFD Domain.
For CFD Convection loads only: Select the appropriate Ambient Temperature Type.

Note:
CFD Near-Wall Ambient (bulk) Temperature (default): This option uses the fluid temperature in the near-wall region as the ambient temperature for the film coefficient calculation. This value will vary along the face.
Constant Ambient Temperature: This constant value applies to the entire scoped face(s). The film coefficient will be computed based on this constant ambient temperature value. Use of a constant ambient temperature value in rare cases may produce a negative film coefficient if the ambient temperature is less than the local face temperature. If this is the case, you can define a Supplemental Film Coefficient. This value will be used in place of the negative computed film coefficient and the ambient temperature adjusted to maintain the proper heat flow.
Under Data View, select the Source Time, for the imported load. The Source Time Step value changes based on the source time you select. If the selected source time corresponds to more than one source time step, you will also need to select the desired time step value. You can also change the Analysis Time and specify Scale and Offset values for the imported loads.
In the Project tree, right-click the imported load, and then click Import Load to import the load. When the load has been imported successfully, a contour plot will be displayed in the Geometry window.
After the solution is complete, a CFD Load Transfer Summary is displayed as a Comment in the particular CFD load branch. The summary contains the following information:
For a CFD Pressure load: the net force, due to shear stress and normal pressure, on the face computed in CFD and the net force transferred to the Mechanical application faces.
For a CFD Temperature load: For surface transfers - the average computed temperature on the CFD boundary and the corresponding average mapped temperature on the Mechanical application faces.
For volumetric transfers – the average, maximum, and minimum temperature of the CFD domain and the corresponding Mechanical Application body selection(s).
For a CFD Convection load: the total heat flow across the face, and the average film coefficient and ambient temperature on the face.
The computed and mapped face data may be compared in order to get a qualitative assessment of the accuracy of the mapped data. The following is an example of a CFD Load Transfer Summary for a CFD Pressure load.


Note:
The force values shown in the CFD Load Transfer Summary should only be used as a qualitative measure of the load transferred from CFD to the Mechanical application mesh. In the example above, the closer the CFD Computed forces are to the Mechanical application Mapped Forces, the better the mapping. The actual force transferred to the Mechanical application is reflected in the reaction forces.

[stumpy]

Yes, the combined stresses would be shown.

[diwakar]

Hey stumpy thanx for replying...actually i did that combined one-way FSI analysis and got some stress and deformation results in structural...but they seem wrong...when i use imported temperature from Fluent and apply fixed support with rotational velocity, then i get wrong stress distribution and also too much deformation. But when i suppress the imported temperature, i can see the correct stress results from rotational velocity. Can u plz help me resolve this problem and tell me how can successfully both import temperature and apply rotational velocity and get correct results from the analysis?

[stumpy]

Have you considered the environment temperature set in Mechanical? This is the temperature at which you assume zero thermal stresses.