[CFD Engineer]

Dear Freinds,

I am working on a tutorial "Buoyant flow in partitioned Cavity " in CFX. i fund the gravity is given in X and Y to compensate the need to tilt the plate by 30 degree. I am confuse how the values -4.9 and -8.5 m/s2 came in the X and Y direction respectively. I know the sine and cosine rule but confused in this particular case. An image of geometry is attached below.

Thank You

cfd.PNG

[HectorRedal]

Originally Posted by CFD Engineer

Dear Freinds,

I am working on a tutorial "Buoyant flow in partitioned Cavity " in CFX. i fund the gravity is given in X and Y to compensate the need to tilt the plate by 30 degree. I am confuse how the values -4.9 and -8.5 m/s2 came in the X and Y direction respectively. I know the sine and cosine rule but confused in this particular case. An image of geometry is attached below.

Thank You

Attachment 53696

I have performed the following calculations:
- 4.9 and 8.5 are the componentes of the gravity vector with module 9.81 = sqrt(4.9^2 and 8.5^2) = 9.81 (as expected)
- acos(4.9/9.81) = 60º which is the complementary angle of 30, based on the reference system.
- asin(8.5/9.81) = 60º which is the complementary angle of 30, based on the reference system.

From my point of view all is correct.