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# Resistance Wire

## This simulation tutorial will walk you through the following:

• Customizing your material.
• Applying thermal convection, power, and radiation boundary conditions.
• Viewing the temperature distribution in the simulation results

## Import the CAD file

1. In OnScale Solve, from the Projects tab of the dashboard, create a new project.
2. In the ToolBar, click (+) and then Library. Within the OnScale Library, Select Resistance wire.

## Assign a material

1. Using the Model tree, select the Resistance wire.
2. From the Material dropdown in the properties panel, select Create Material.
3. Rename the Material Name to Constantan.
4. Enter the properties in their various dialog boxes as shown below:
 Properties Value Mass Density (kg/m3) 8885 Poisson’s Ratio 0.3 Young’s Modulus (Pa) 162e6 Specific Heat (J/(kg*K)) 410 Thermal Conductivity (W/(m*K)) 23 Thermal Expansion (1/K) 13.5e-6

5. Click Done to save changes.

## Add a power source

1. Select the tab.
2. In the toolbar ensure that the Mechanical Physics is toggled off, and enable Thermal Physics.
3. Select the Thermal icon  , then select Power load.
4. Select the Resistance wire part from the Model tree.
1. Enter 3.2 W in the Power property panel, then select Done.

## Thermal Environment settings

1. Click on Thermal Environment.
2. Click on edit.
3. Enter 26.85 C as the Ambient temperature.

## Add the convection coefficient

1. Select the Thermal icon , then select the Convection constraint.
2. Using the Model tree, click on the dropdown arrow within the Resistance wire.
3. Select all three faces of the resistance wire.
4. Enter 100 under the Convection Coefficient field of the properties panel. Then, select Done.

1. Select the Thermal icon , then select the Radiation constraint.
2. Using the Model tree, click on the dropdown arrow within the Resistance wire.
3. Select all three faces of the resistance wire.
4. Enter 0.8 under the emissivity field of the properties panel
1. Enter 26.85 as the Far-Field temperature. Then, select Done.

## Run a simulation

1. Select the simulator tab.
2. Click on the Launcher to run the simulation
3. Once the meshing and estimation is complete, Select Launch to run the simulation study.

## Analyze the results

1. Once the simulation has finished, select Load Results to open the results in the Results tab.
2. Temperature will be the selected dataset for the Thermal simulation.
3. Expand the Settings option and toggle Show Mesh on.
4. What is the maximum operational temperature on the wire in degrees Celsius?
5. Would the resistance wire fail?