======Ex-2: Thermal simulation of a heat sink======

🧰The Rhino and Grasshopper files used in this example can be downloaded here: {{:wiki:sns:intactgh:gyroid_heat_sink.zip}} \\
*Legacy* files for Rhino 7 can also be found here: {{:wiki:sns:intactgh:gyroid_heat_sink_rhino7.zip}}


This example demonstrates how to simulate heat transfer of a heat sink as shown in the picture below. This geometry is generated in [[https://www.ntop.com/|nTop]].

{{:wiki:sns:intactgh:ex2_a.png|}}

  * The key steps involved in setting up the simulation are explained here.
  * New users are advised to checkout the [[wiki:sns:intactgh:getting_started|getting started]] page to understand the basics of using the plugin.

=====Geometry and material setup=====

  * Create a geometry object on the canvas. Set the geometry to the heat sink, and let’s name this geometry as “heat sink” as shown in (a)
  * Create an Intact component and connect the heat sink block’s output to the component as shown in (b)
  * Create an Intact thermal material block. Right click on the block and choose Aluminum 6061 as the material %%(c)%%. 

{{ :wiki:sns:intactgh:ex2_b.png |}}
=====Applying thermal loads=====
  * The load and restraint surfaces are shown in (a) below
  * Create a geometry object and set it to the bottom surface. Let’s name this geometry as “fixed temperature surface” as shown in (b)
  * Create a Temperature boundary condition block as connect the fixed temperature surface block’s output to the component as shown in %%(c)%%
  * Create a geometry object and set it to the top surface. Let’s name this geometry as “flux surface” as shown in (d)
  * Create a "flux boundary condition" block and connect the flux surface and the flux magnitude of -1.0E5 W/m<sup>2</sup>, as shown in  (e)
  * Merge the temperature and flux boundary condition blocks as shown in (f)

{{ :wiki:sns:intactgh:ex2_c.png |}}
=====Setup solver=====
  * Create a solver settings block as shown in (a)
      * Set the target resolution of 100K
      * Select the linear solver type (direct)
      * Select the basis order ( basis order = 1 for linear elements)
  * Set up the solver block as shown in (b)
      * Connect the solver settings (SS)
      * Connect the heat sink (C)
      * Connect the merged boundary condition block (BCt)
  * Hit solve to compute the solution

{{ :wiki:sns:intactgh:ex2_d.png |}}
=====Setup visualization block=====
  * Create a visualization block (b) and connect the solver output to the visualization block
  * Optionally, users can connect the visualization settings block for customizing the views
  * Right click on the visualize block and choose the simulation output for display (e.g. temperature or heat flux).

{{ :wiki:sns:intactgh:ex2_e.png |}}

The temperature distribution of the bonded assembly is displayed below, which shows that the max-min temperature is approximately 320K and 292K, respectively.

{{ :wiki:sns:intactgh:ex2_f.png? |}}