Fluid Analysis Tab

Setting Item

Notes

Analysis Type

Steady-State Analysis

There is no time dependency.

Transient Analysis

Transient states are analyzed.

Options

Notes

Laminar Flow/Turbulent Flow

Executes calculation assuming the flows are either laminar or turbulent.

Initial Value/Restart

If Use the last analysis results is selected,
the previous results which were not converged or aborted can be used as initial values.

If Use another analysis results (Results Import) is selected, an analysis model that was already analyzed or the results file is used as the initial values for the calculation.

The analysis model or the results file is specified on the [Results Import] tab.

Click the [Detailed Setting for Restart] button to show a dialog box.

If Calculate quasi-steady state is selected, the analysis with finite timesteps is applied when restarting.
Effective for the case where steady state does not exist or calculation does not converge due to the non-steady vibration.
An instantaneous state of the vibration is output.

If Hand over the time is selected, the time of the previous analysis results or another analysis results is handed over.

If the results of the previous analysis were up to 10 s for example, this option allows the analysis to continue without removing the results up to 10 s of the previous analysis.
(It corresponds to selecting [Continue from the last session] on the [Transient Analysis] tab)
If [Hand over the time] is not selected for the transient analysis, the results up to 10 s are removed and the analysis starts using the results at 10 s as an initial value.

If the analysis type of fluid is steady-state or if transient analysis is applied for the thermal or diffusion analysis, all the previous results are removed and the analysis starts at 0 s.

Different analysis conditions from the previous analysis can be applied as well.

The setting here automatically determines the settings of [Continue from the last session] on the [Transient Analysis] tab and [Import Type] on the [Results Import] tab.

Layer Mesh Setting for Wall Surface

Enables the general settings for the layer mesh of the wall surface.
If the individual setting is not applied to each boundary condition, the settings here are applied.

Click this button . The [Layer Mesh Setting] dialog box will appear.

Diffusion Analysis Setting

Sets the diffusion analysis.

Multiphase Flow Setting

Sets the multiphase flow.

Detailed Setting

Sets the parameters relating to the accuracy and convergence.

Click this button . The [Detailed Setting of Fluid Analysis] dialog box will show up.

Notes

Be sure that if you want to take into account the buoyancy ,

select [Thermal Analysis] on the [Solver] tab, and select [Take into account buoyancy] on the [Fluid-Thermal Analysis] tab.