Solution dialog box — Restart

Option	Analysis/Solution Type	Description
Perform Restart	All	Restarts the solution using the results from a previous solution.
Restart Files Location	Appears when Perform Restart is selected.Controls where the restart solution looks for solver files that contain data from the previous solution. You can either select Run Directory or select Specify to select a different location.
Restart Files Directory	Appears when Restart Files Location is set to Specify.Sets the path to the directory that contains solver files. See Restarting a solution for the list of necessary solver files that are needed for a restart of a thermal or flow analysis.
Options
Appears when Perform Restart is selected.
Restart Options	Advanced ThermalAdvanced Axisymmetric ThermalAdvanced Thermal-FlowAdvanced Thermal-Flow with ESCSpace Systems Thermal	Lets you specify different thermal restart options to avoid complex calculations for the current analysis. You can selectively run specified thermal solver modules by overwriting previously calculated data, and reusing other previously calculated data.
Conduction, Capacitance and Duct Network	Appears when Restart Options is selected.Controls whether you want to recalculate or reuse the specified data.Delete previous – Calculate newRecalculates the conduction, capacitance, and duct network data when you change the conductivity, specific heat, density, physical property or fluid property of at least one material in your model.Reuse previous – Do not calculateReuses the specified data from the previous solution.
Thermal Couplings	Appears when Restart Options is selected.Controls whether you want to recalculate or reuse the specified data.Delete previous – Calculate newRecalculates the thermal coupling data when you modify at least one of the following parameters of your existing Thermal Coupling simulation objects:The type or value of your thermal coupling.The primary or secondary region.The coupling resolution.Reuse previous – Do not calculateReuses the specified data from the previous solution.
Convection Coupling	Appears when Restart Options is selected.Controls whether you want to recalculate or reuse the specified data.Delete previous – Calculate newRecalculates the convection coupling data when you modify:Any parameters of your existing Thermal Coupling — Convection simulation object.Ambient conditions when your model includes a Convection to Environment constraint.Reuse previous – Do not calculateReuses the specified data from the previous solution.
Black Body View Factors	Appears when Restart Options is selected.Controls whether you want to recalculate or reuse the specified data.Delete previous – Calculate newRecalculates the black body view factors when you change the selection or modify parameters on the Radiation simulation object.Reuse previous – Do not calculateReuses the black body view factors from the previous solution.Reuse previous – Calculate newReuses the black body view factors from the previous solution and calculates black body view factors for all active elements in the current solution.Note: You must deactivate previously calculated regions using the Deactivate Radiation option in the Deactivation Set or Deactivation Set Advanced simulation object if you do not want to double the black body view factors for these regions.
Radiative Conductances	Appears when Restart Options is selected.Controls whether you want to recalculate or reuse the specified data.Delete previous – Calculate newRecalculates the radiative conductances when you modify the Radiation or Thermal Coupling — Radiation simulation objects or the emissivity of any element.Reuse previous – Do not calculateReuses the radiative conductances from the previous solution.Reuse previous – Calculate newReuses the radiative conductances from the previous solution and calculates radiative conductances for all active elements in the current solution.Note: You must deactivate previously calculated regions using the Deactivate Radiation option in the Deactivation Set or Deactivation Set Advanced simulation object if you do not want to double the radiative conductances for these regions.Warning: You should always recalculate radiative conductances if you recalculate black body view factors.
Solar and Orbital View Factors	Appears when Restart Options is selected.Controls whether you want to recalculate or reuse the specified data.Delete previous – Calculate newRecalculates the solar, IR, and orbital view factors when you modify the parameters or the selection of the following simulation objects:Orbital HeatingRadiative HeatingSolar Heating****Reuse previous – Do not calculateReuses the solar, IR, and orbital view factors from the previous solution.Reuse previous – Calculate newReuses the solar, IR, and orbital view factors from the previous solution and calculates the solar, IR, and orbital view factors for all active elements in the current solution.Note: You must deactivate previously calculated regions using the Deactivate Radiation option in the Deactivation Set or Deactivation Set Advanced simulation object if you do not want to double the solar, IR, and orbital view factors for these regions.
Solar and Orbital Heat Fluxes	Appears when Restart Options is selected.Controls whether you want to recalculate or reuse the specified data.Delete previous – Calculate newRecalculates the solar and orbital heat fluxes when you: Modify the solar spectrum properties of one of your materials.Modify the source fluxes.Calculate new solar, IR, or orbital view factors.Reuse previous – Do not calculateReuses the solar and orbital heat fluxes from the previous solution.Reuse previous – Calculate newReuses the solar and orbital heat fluxes from the previous solution and calculates solar and orbital heat fluxes for all active elements in the current solution.Note: You must deactivate previously calculated regions using the Deactivate Radiation option in the Deactivation Set or Deactivation Set Advanced simulation object if you do not want to double the solar and orbital heat fluxes for these regions.Warning: You should always recalculate solar and orbital heat fluxes if you recalculate solar, IR, and orbital view factors.
Solve Steady State Particle Tracking Simulation Only	Advanced FlowAdvanced Thermal-FlowAdvanced Thermal-Flow with ESC	Solves only the particle tracking simulation using the flow field from the previously solved steady state solution. You can make the following modifications to your solution before restarting it:Add Particle Injection simulation objects.Modify Flow Surface and Screen simulation objects.Modify particle tracking options on the 3D Flow page in the Solution dialog box and on the 3D Flow Solver page in the Solver Parameters dialog box.
Parallel Flow Solver Restart Backup File Options
Available when Flow Solver Selection is set to Parallel Solver on the Solution Details page.
Create Backup Files	Flow****Coupled Thermal-Flow	Specifies how to create the backup files.For Paused or Completed SolutionCreates backup files for both steady state and transient solutions when you pause the solution or when the solution finishes.At Specified Number of IterationsCreates a backup file for a steady state solution at every N number of iterations. N is the value that you specify in the Number of Iterations box.At Results Sampling TimesCreates a backup file for a transient solution at each results sampling time. You set the sampling times on the Transient Setup page in the Results Sampling group.NeverDoes not create backup files. You cannot restart solutions if you use this option.
Update Backup Files with Stopped or Completed Solution	Flow****Coupled Thermal-Flow	Appears when Create Backup Files is set to At Specified Number of Iterations or At Results Sampling Times. Updates the backup files between two iteration intervals or two sampling times when you stop the solution or if it crashes. You can restart the solution from where you stopped it, or from where it crashed, using the updated backup file.

Learn more

Solution options

Restarting a solution

Restarting a solution using the thermal solver

Look up more details

Solution dialog box —Solution Details

Solution dialog box — Solution Units

Solution dialog box — Ambient Conditions

Solution dialog box — Initial Conditions

Solution dialog box —Thermal

Solution dialog box —3D Flow

Solution dialog box —Transient Setup

Solution dialog box — Results Options

Solution dialog box (Mapping) — Mapping Details

Solution dialog box (Mapping) — Optional Output

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal

Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal boundary conditions

Solution dialog box — Restart , Simcenter 3D 2021.1 Series

© 2020 Siemens

window.mainLanguage="en_US"

window.delivId=""

window.projectId=""

MathJax.Hub.Config({ TeX: { extensions: ["autoload-all.js"] }, tex2jax: { displayMath: [ ] }, "SVG": { scale: 125 } });