Fluids

Fluids

Simulation of solar radiation

    • Zhenming.Peng
      Subscriber

      hi all,

      i would like to perform a building simulation. the radiation from the sun will be taken into account.

      here i have a question about setting the solar irradiation in the setting card.

      which direction of the direct irradiation does it mean? i mean it can be horizontal irradiance or tilted irradiance or normal irradiance.

      which irradiance does the input of direct irradiance mean?

      thanks for the help!

    • Karthik R
      Administrator
      Hello You should be able to specify the Sun Direction Vector of the sun.
      Regarding the definitions of Direct and Diffuse Irradiations, please take a look at the following link.
      https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v211/en/flu_ug/flu_ug_Radiation_Model.html?q=solar%20radiation
      I hope this helps.
      Karthik
    • Zhenming.Peng
      Subscriber
      Hi Karthik
      thanks for the reply.
      i know wen can define the sun direction.
      but i dont know how ansys defines the direct solar irradiation because if depends on the observed area.
      i couldnt open the link, nor login to the custom portal.
      Could you please briefly here describe whats their definitions in ansys?
      that would help a lot thanks!
    • Rob
      Ansys Employee
    • Zhenming.Peng
      Subscriber
      Hi Karthik

      i had already read the help documentation before.
      there is no clear definition of the direct radiation
      it shows:
      Illumination Parameters
      Direct Solar Irradiation
      is the amount of energy per unit area due to direct solar irradiation.
      it basically doesnt explain which direct radiation i should use as input (the value of horizontal irradiance, or normal irradiance)
      regards
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