Can we use radiation models?

Hi Ali !

I going to fix up problem and i share of my work experience which i got when i was working on solar energy project .

firstly i would you suggest that never be initialization the simulation in parallel mode in this case solution will be effected by this so always initialize in serial mode.

now let i come at you problem - you can easily apply solar load in fluent

you just follow this simple steps :-

1.Go to the model option and select radiation option and put the all details over there.

2. while define the problem you have to turn on the gravity for some case.

that's it .

regards

S. Shukla

Assalam O Alakium Basil Ali,

Yes you can can we apply solar load in Fluent CFD software.

For more specific you can find DO model in Radiation tab.

You can perform your task there. Even you can also go for non gray setting.

Furthermore, I agree with Mr.shrish shukla to run in serial mood.

Do not run in parallel. Its goes wrong with parallel processing.

waslam

Good Luck

Does this issue with running in parallel happen in all versions?

In ansys 14.5,& 14 I have experienced the parallel problem. I am not sure about older versions & ansys 15.

Thank you Tipu. Good to know for future projects.

thank you all for your answer. shrish ,tipu and carlos ,but why we use DO model

can't we apply the just solar load

In Oder to perform your simulation you have to follow some model e.g. In Radiation modeling (Simulation) you have 5 model for simulation. DO is one of them.

In Oder to apply solar load you need some model. Which you can perform in DO.

thank you Mr Tipu , actually the solar load model is a model itself

Thanks Basil Ali for the information.

I used DO radiation model with 700W/m2 heat flux. after simulation I got contour for incident radiation in which values found too high as about 7200W/m2. Why this is? Am I wrong somewhere?

Check this link it has useful hints for your simulation

https://www.researchgate.net/publication/277286317_A_novel_computational_approach_to_combine_the_optical_and_thermal_modelling_of_Linear_Fresnel_Collectors_using_the_finite_volume_method

Article A novel computational approach to combine the optical and th...

Yes, for solar loading you have to applied one radiation model and applied solar loading or solar ray tracing according to their location. in Ansys 18.2 or latest version of Ansys you can applied parallel processing.