Question:
How is the C-p coefficient of the surface result determined in RWIND Simulation?
Answer:
The C-p coefficient surface result normalizes the determined wind pressure with the dynamic pressure q(H) of the undisturbed inflow at the top edge of the model.
The C-p coefficients or wind pressure coefficients are determined individually at each location of the surface. The positive values correspond to a compressive load and the negative values correspond to a suction load away from the surface.
| p | Wind pressure |
| q(H) | Dynamic pressure in the freestream at height H |
| H | Roof height |
The wind pressure from the undisturbed inflow is determined by means of the wind profile at the wind tunnel inlet at the height H. Height H is determined automatically, using the highest available model edge.