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Modifying the Incident Solar Radiation

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Old   May 4, 2020, 07:44
Default Modifying the Incident Solar Radiation
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Evening Guys,

Hope you are all well.

Is there a way that the incident solar radiation can be modified? When I check the contours of incident solar radiation after initialization, I get values of between 1600~1700 W/m2. Which are incorrect for winter conditions.

In the solar model, I specified the global position and dates appropriately and reduced the sunshine factor to 0.038 to reflect the conditions of the experimental day. On applying these settings, in the console in FLUENT, I get normal and diffuse solar irradiations quantities that are almost the same as the experimental values: Direct Normal = 35W/m2 and Diffuse = 77 W/m2.

The global solar radiation was 71 W/m2 at the start of the experiment.

The funny thing is if I turn off radiation and only use energy and turbulence models, the simulation results match the experimental results with just minor discrepancies.

On turning on the radiation model, the temperatures are much higher especially at the top of the greenhouse which aligns with the areas that receive the high incident radiation.

I would like to use the radiation model but reduce the incident radiation to match the experimental data.

There is no option to change it in the GUI and TUI.

Please help.

Thanks, Much appreciated.
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