Learning Forum

[chandanapdev]

Hai,

I am doing a project of pressure evaluation on rooftop solar panels subjected to wind loads.

When i started calculating the coefficients, during iteration i found that my lift coefficient values and drag coefficient values are very high. My building model is of dimension, 0.525 x 0.52 x 0.4 m and the panels over that is of dimension 0.42 x 0.04 m. i have used hybrid meshing and the cells are about 6 millions. I didn't complete the iteration but felt the answer is wrong. My reference values are shown below. as you can see, the values i have shown in console are at a range of 10^20 + ...

Can anyone help me please.

 

[chandanapdev]

[Kalyan Goparaju]

Hello, 

Can you please share a screenshot of how you setup your report definitions? 

Thanks,

Kalyan

[chandanapdev]

[chandanapdev]

Hai

Thank you for your reply.

Is that the detail you asked for sir? I have created named selection for each panels and selected those panels to plot drag and lift coefficients.

[Kalyan Goparaju]

Hello,

Yes, this was what I was asking for. I notice that the Force vector is 1 0 0. Have you cross-checked it to make sure that it is infact the appropriate force-vector for Drag? Can you please share some images of the model?

Thanks,

Kalyan

[chandanapdev]

Hi sir

Drag force can be in both x and z direction know. even if its towards x or y this value should not come know? This seems to be huge.

Model of both building and panels over it is shown below. I am considering 0 degree angle of attack.

[chandanapdev]

the building and panels alone is shown here 

[chandanapdev]