Error Virtual Wind Tunnel:
On the following document I detail step by step the procedures used to design, to create the mesh and finally the importation to Virtual Wind Tunnel.
The error occurs when running the VWT. The pop-up black screen appears marking the address where you saved the document, and after some time the message JOB NON STARTED still appears. In the end, the pop-up screen disappears after a few minutes. (Which does not happen in the documents that run without any failure)
Now, I will describe all the steps taken so far to get the .VOUT document in search of the error. I would be grateful if you could help me detect this error, as I have to give in this project for my Final Work in October, and I need to solve the problem as soon as possible.
1. CAD DESIGN:
(The first design had overlaps between surfaces, causing a critical error in the mesh, this time I have solved the problems in such a way.)
After the binding errors found in the area of the pontoon and the need to attach these parts, I modified the design. The resulting pieces bind together perfectly with no spaces between them, and there are not any areas that exceed each other.
This is the document when opening it from SolidWorks, checking the critical areas of the previous model.
Pontoon outdoor area in the previous design, there were areas where both surfaces did not touch each other, they have been modified and now connect perfectly.
( Image 2 )
Pontoon inner zone in which previously the surfaces exceeded each other, now they are perfectly inserted. There are no spare parts, and no strange lines appear when moving the mouse on it.
1. 1. IMPORTING STEP EN HYPERMESH: (Image 4)
1. 2. Scaling the piece for VWT:
We use: Tool > scale > scale-
1. Unify all components in the same solid:
We use the commands: geom > solid edit > boolean > simple > A: Solids : (we select the elements in the image, creating a single body except for the wheels that remain as independent solids.) > calculate.
Then we check that a solid has been generated, and the other components have been emptied.
We note that all the components are unified generating a single solid, which has been saved as ''difusor15ynuevoponton ''.
1. 3. MESHING: Commands: 2D > automesh > surface deviation :
select the solid pressing: surfs > by collector: I select the solid. > selec
I Pulse Mesh, and 300 elements are created, the program suddenly marks the mistake of two surfaces without meshing.
Then I run the automesh with Size & Bias, the element heving the size of 7.5 e-3.
The result given is 350,798 elements.
Later on I check the area that was wrong, that I said before it was at the junction of the pontoons to the broadcasters, ensuring the continuity of the mesh. Apparently the mesh is continuous.
I mesh the tires, giving them a size of a slightly larger element. (0.01)
Leaving a total of 86,960 items with the meshing of the 4 wheels.
Leaving a final result like this:
Then we will check for duplicates, the min and max angles and finally if there are any free edges.
This way, the meshing of the car would have been completed, and as indicated, a closed volume has been generated.
Now we import in FLUENT (Nastram) to open the VWT.
Virtual Wind Tunnel:
1. 1. WE PLACE VEHICLE IN THE MIDDLE OF TUNNEL
We also slightly introduce the wheels on the ground.
1. 2. IDENTIFY THE MAIN PARTS:
1. 3. Refinement Area:
The Black Pop-up window emerges
After an hour and a half acuMeshSim disappeared from the Task Manager, the message still remains as:
In case it works, the program is not closed for the moment...
I opened the .VOUT, to check the errors that appear and compare them with the previous document, in which the errors were displayed in the mesh.
The document that showed errors in the meshing showed the following message:
The .VOUT of this program that I have explained, the message is as follows:
We can see that the errors have disappeared in the meshing. But I can’t run the program.
I think it does not get to calculate the whole meshing.
If someone could help me please! I need to have results for my TFG.
THANKS YOU VERY VERY MUCH.