3.5. Elmer NF55¶
In this tutorial a temperature calculation of first wall panel (FWP) 4 will be presented. This tutorial is a continuation of ITER nf55 benchmark case, that can be seen in. Temperature distribution will be calculated based on provided surface heat flux distribution, computed with NF55 case.
First, one has to move to Elmer module. In the upper toolbar of Smiter GUI we navigate to DropDown selection name Modules as shown in image Fig. 3.52.
There we see options for different modules, that are available in Smiter. We click on ELMER. See figure Fig. 3.53.
The screenshot of Elmer consists of two main dialogs that can be found in the upper toolbar. See figure Fig. 3.54.
Two possible dialogs are:
- Create new ELMER case: With this dialog we can create new Elmer case for temperature calculation.
- Show ELMER tools dialog: With this dialog we can define completely new ELMER case with its own meshes, boundary conditions, material properties and its own physical model, that does not neccessarily mean heat transfer model, but also other mathematical models like Navier-Stokes equations, thermomechanical analysis, etc.
Here, one has to select Create temperature case. The following dialog appears on the screen. See figure Fig. 3.55.
First, we have to define the name of our case. We choose to input
nf_55. Then we have to navigate to the
vtk file of the SMITER
nf55 case. It can be found in smiter/studies/elmer_nf55/nf_55.vtk
Then we define the panel type and then the panel position. After all
the values are defined, we click Apply. After that we can move to
the object browser. In the object browser we can see the tree
structure of the objects defined in the study. If it is not there, one
can click on icon next to Temperature cases. See figure
Under Elmer we can see the tutorial case with the name nf_55 *. If we right-click on it, a list of options appears on the screen. If we click on *Compute case, the computation will start. With option Edit case one can edit the current case options and with option Delete case one can delete the case from the study. With option Delete case one can delete case from study and with option Rename case one can change the name of the case. See figure Fig. 3.57.
User can also edit or replace current SIF file by right-click on SIF file in Object Browser.
When the cases is ready to run right-click again on case object and click Compute case. Refer to figure Fig. 3.57. User can observe different stages of computation in the ELMER Output Dialog located in the bottom left corner. See figure Fig. 3.58.
After the computation is finished, we can move to the ~/elmer-compute
folder (or user-defined folder for elmer cases, that can be defined),
where temperature files are stored by default. Inside there is a new
folder with the same name as the name of input
vtk file. If we
open this folder the following file structure is revealed to us. For
every finger there is a folder with names fingerleft and
fingerright with ID number of finger. Inside those folders there are
mesh files and
sif file of the individual finger. Last two files
are the output files of the computation File with
contains full mesh with temperatures and heat fluxes. File
temperatures.dat contains coordinates of nodes on the plasma facing
surface and their temperatures in tabular form. Both result files are
copied in the main directory of the temperature computation. File
fullVtk.vtk is a full
vtk file with all the fingers,
temperatures and heat fluxes.
nf_55 ├── fingerleft* │ ├── casevtk.sif │ ├── elmersolver.log │ ├── mesh.boundary │ ├── mesh.header │ ├── mesh.names │ ├── mesh.nodes │ ├── meshpartition.unv │ ├── casevtkfile.0001.vtk │ └── temperatures.dat ├── fingerright* │ ├── casevtk.sif │ ├── elmersolver.log │ ├── mesh.boundary │ ├── mesh.header │ ├── mesh.names │ ├── mesh.nodes │ ├── meshpartition.unv │ ├── casevtkfile.0001.vtk │ └── temperatures.dat ├── caseEHF.sif ├── fingerleft*.vtk ├── fingerright*.vtk ├── Powcal_powx.vtk └── Powcal_powx_Temperatures.vtk
After the computation has finished, one has to move to Paraview. See figure Fig. 3.59.
Then move to
Pipeline browser and right-click on
open. See figure Fig. 3.60.
The navigate to the compute folder and select file Powcal_powx_Temperatures.vtk. The file will be imported into Paraview and seen in the Pipeline Browser.
To change colormap preset, move to Color Map Editor and click on set preset icon, as shown in figure Fig. 3.61.
The following window (see figure Fig. 3.62) will appear. Select Black-Body radiation colormap and click apply.
The result is a full first wall panel with temperatures, as shown in the figure Fig. 3.63.