Suspended floor on Wudi 2D

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Ecozimut
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Joined: Tue Jul 20, 2021 3:53 am -1100

Suspended floor on Wudi 2D

Post by Ecozimut » Tue Jul 20, 2021 4:13 am -1100

I am trying to study a suspended floor, with an exterior surface on the underside. As I understand it, the orientation tab in the Exterior surface parameters only allows me to choose an inclination going from 90 (vertical wall) to 0 (flat roof), but does not account for downward facing surfaces. Am I misunderstanding something ?

Thank you

Thomas
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Joined: Sun Jun 19, 2005 10:33 pm -1100

Re: Suspended floor on Wudi 2D

Post by Thomas » Tue Jul 20, 2021 9:46 pm -1100

Hi Ecozimut,

the inclinations are indeed limited to values between 0° and 90°. To simulate a downward-facing surface,
  • set the inclination to zero
  • set the short-wave radiation absorptivity to zero in order to "switch off" any solar radiation
  • set the "Adhering fraction of rain" to zero in order to "switch off" any rain
  • switch off the option "Explicit radiation balance" in order to avoid night-time radiative cooling by radiation exchange with the sky
  • optionally use a smaller value for the heat transfer coefficient if you wish to take a somewhat "sheltered" situation into account
Kind regards,
Thomas

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