Temperature

Use Temperature to specify that selected geometry or elements remain at a known temperature regardless of heat flow. You can:

• Constrain the temperature of either thermal or fluid elements.

• Define the temperature as a constant or varying with time, heat flow rate, or thermal capacitance.Note: For a steady state analysis, the solver treats transient Temperature constraints according to the Transient Thermal Loads to Use for Steady State option that you select on the Solution Details page in the Solution dialog box.

• Use previously calculated temperature results to define a constant value for each element individually.

• Define a temperature field that varies spatially.Note: If you specify both a field for magnitude of the temperature and a spatially-varying distribution, you must specify the same model units and solution units for the temperature.

Supported geometry and mesh

Any order of geometry is supported. You can also directly select one or more elements. The constraint is applied to the selected elements.

Geometry at known temperature	Select
Body surface	One of the following:Surface meshed with 2D elementsFace of a body meshed with 3D elements
Solid body	Solid body meshed with 3D elements
Edge or curve	One of the following:Edge or curve meshed with 1D elementsEdge of body face meshed with 2D elements
Vertex or point	Mesh point or point meshed with a 0D element

Supported variables and functions

The following table lists the independent variables and auto-generated expressions for the Temperature quantities that you can define using fields and expressions.

Quantity	Variables	Auto-generated expressions
Temperature	TimeHeat flow rateThermal capacitanceSpatial variablesTime, spatial variablesHeat flow rate, spatial variablesThermal capacitance, spatial variables	fluid_temperatureheat_flow_ratemass_flow_ratenxnynzpressureradiusrotational_speedtemperaturetemperature_differencethermal_capacitancethicknesstimevolume_flow_ratexyz

In expressions, you can also use all built-in functions that are listed in Mathematical functions in expressions and most built-in functions that are listed in Thermal-flow functions in expressions.

Where do I find it?

Application	Pre/Post
Command Finder	Temperature
Simulation Navigator	Right-click the Constraint Set node→New Constraint→Temperature

Learn more

Inputs to expressions

Look up more details

Auto-generated expressions

Quick links

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

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

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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Temperature, Simcenter 3D 2021.1 Series

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