Low volume but damn you gave me the answer I have been searching the whole internet during the last week. So we actually need to take into account for the "width" in a 2D simulation. Thank you!
I have a prop simulated by MRF SimpleFoam. I am getting my forces in a dat file. But I don;t know if they are Force coeffs or the real force. What does it provide ? Thanks in advance for the help.
If i have a Square shape with side length of 1, what will be the Aref and Lref,? and why you said Aref equal D x by the span-wise, i think it is perimeter x span-wise length
Moto Light For many objects it is convention to use the projected area, so d * l for the circular cylinder, which is the largest cross section. Image using a flashlight and point it in the flow direction on the object. The shadow is the reference area. For airfoils or bridges the definition is different however.
I got it now, that is mean if i have a square it is also one side length * L in spanwise, but for the reference length is it the side dimension for a square and D for circle
Is there a way to calculate forces at different angles of attacks in one simulation. I mean, with varying angles of attacks in one single simulation? Any help would be appreciated.... Thanks in advance
I guess the easiest way is to just move your structure and use a moving mesh approach. In the latest version search for tutorials containing a dynamicMeshDict in the system directory and adjust the pointDisplacement file in the 0 directory according to your needs. Internet search should help you with the right parameters.
![Custom OpenFOAM Solver [1/2] : Adding Temperature to icoFoam #FromBasics](http://i.ytimg.com/vi/SYB5nfeZ0dA/mqdefault.jpg)
Low volume but damn you gave me the answer I have been searching the whole internet during the last week. So we actually need to take into account for the "width" in a 2D simulation. Thank you!
Keep it up, audio volume was a bit weak but very good information. Thanks for the video
I have a prop simulated by MRF SimpleFoam. I am getting my forces in a dat file. But I don;t know if they are Force coeffs or the real force.
What does it provide ? Thanks in advance for the help.
If i have a Square shape with side length of 1, what will be the Aref and Lref,?
and why you said Aref equal D x by the span-wise, i think it is perimeter x span-wise length
Moto Light For many objects it is convention to use the projected area, so d * l for the circular cylinder, which is the largest cross section. Image using a flashlight and point it in the flow direction on the object. The shadow is the reference area.
For airfoils or bridges the definition is different however.
I got it now, that is mean if i have a square it is also one side length * L in spanwise, but for the reference length is it the side dimension for a square and D for circle
Is there a way to calculate forces at different angles of attacks in one simulation.
I mean, with varying angles of attacks in one single simulation?
Any help would be appreciated....
Thanks in advance
I guess the easiest way is to just move your structure and use a moving mesh approach. In the latest version search for tutorials containing a dynamicMeshDict in the system directory and adjust the pointDisplacement file in the 0 directory according to your needs. Internet search should help you with the right parameters.
Thanks a lot fo the help
Am not sure that is the correct definition of area though
he uses the projected area which is the area you would see if you looked directly at the cylinder from the direction of flow