2.8.2 Changing Case and Mesh Settings After a Calculation Has Started

If changes to the settings have been made and the mesh has not been changed using tools in FLUENT, you are prompted with the following dialog:

Figure 2.8.2: The Settings have changed! Dialog

Since changes were made to the settings after you began the calculation, you have to specify whether or not the settings changes should be saved to the settings file.

You can choose any of the following actions:

• Select the Do not store the modified settings for a future calculation; use them just this time option in the warning dialog. The modified settings will not be saved to the settings file. The action you requested when you were prompted will proceed. If you had selected to calculate, the iterations (or time-steps) will start using the new settings. If you had selected to close FLUENT, or save the project, the new settings will be stored in the case file that is written as a result of either of those actions.

  If you open FLUENT from the Setup cell, or update or refresh the Setup or Solution cell from the Project Schematic, the settings will be replaced with the settings in the settings file that is associated with the Setup cell. To calculate using the new settings either open FLUENT from the Solution cell or select Continue Calculation from the Solution cell's context menu.

  If you want to use the new settings as the starting point for another analysis, simply create a new FLUENT-based system and import the new case file that contains the new settings into its Setup cell.

• Select the Store the modified settings for a future calculation and use them this time option in the warning dialog. The modified settings will be saved to the settings file. The action you requested when you were prompted will proceed. If you had selected to calculate, the iterations (or time-steps) will start using the new settings. If you had selected to close FLUENT, or save the project, the new settings will also be stored in the case file that is written as a result of either of those actions.

• Select Cancel in the warning dialog. Create a new duplicate system (see Section  2.7), modify the settings, and connect the Solution cells for the two systems so that the calculations will be performed in sequence.

• Select Cancel in the warning dialog and create a case modification strategy that automatically performs the desired settings changes after the appropriate number of iterations (or time-steps); see Section  2.9 for more details.

The last two approaches allow you to automatically repeat setting changes after a specified number of iterations (or time-steps) every time you perform an Update or restart the calculation from the Setup cell.

If the mesh has been changed using tools in FLUENT (including changes made using dynamic or sliding mesh), you are prompted with the following dialog:

Figure 2.8.3: The Mesh and settings have changed! Dialog

You need to specify whether or not any changes you made to the settings after you began the calculation should be saved to the settings file.

Whenever you modify the mesh in FLUENT, you also make changes to some settings in FLUENT. Therefore, mesh modifications always result in setting changes.

The original mesh cannot be replaced by the modified mesh after the calculation has begun.

You can choose any of the following actions:

• Select the Do not store the modified settings or within-FLUENT mesh changes for a future calculation; use them just this time option in the warning dialog. The modified settings will not be saved to the settings file. The action you requested when you were prompted will proceed. If you had selected to calculate, the iterations (or time-steps) will start using the new settings and the modified mesh. If you had selected to close FLUENT, or save the project, the new settings and the modified mesh will be stored in the case file that is written as a result of either of those actions.

  If you open FLUENT from the Setup cell, or update or refresh the Setup or Solution cell from the Project Schematic, the settings and the modified mesh will be replaced with the mesh and settings in the files that are associated with the Setup cell. To calculate using the new settings and the modified mesh, either open FLUENT from the Solution cell or select Continue Calculation from the Solution cell's context menu.

  If you want to use the new settings and the modified mesh as the starting point for another analysis, simply create a new FLUENT-based system and import the new case file that contains the new settings and the modified mesh into its Setup cell.

• Select the Store the modified settings for a future calculation and use them this time; but do not preserve the within-FLUENT mesh changes. option in the warning dialog. The modified settings will be saved to the settings file. The action you requested when you were prompted will proceed. If you had selected to calculate, the iterations (or time-steps) will start using the new settings and the modified mesh. If you had selected to close FLUENT, or save the project, the new settings and the modified mesh will also be stored in the case file that is written as a result of either of those actions.

  If you open FLUENT from the Setup cell, or update or refresh the Setup or Solution cell from the Project Schematic, the new settings will be used in conjunction with the mesh in the file that is associated with the Setup cell. Since those settings may have been specified after the mesh was modified, you must verify that the new settings are consistent with the original mesh.

• Select Cancel in the warning dialog and create a case modification strategy that automatically performs the desired settings changes and mesh modification steps after the appropriate number of iterations (or time-steps); see Section  2.9 for more details. This allows you to automatically repeat the desired setting changes and mesh modification steps after a specified number of iterations (or time-steps) every time you perform an Update or restart the calculation from the Setup cell.