# HydroGeoSphere/Thermal Energy

## Specified temperature flux

1. ntime Number of panels in the time-variable, specified temperature flux function. For each panel, enter the following:
(a) ton_val, toff_val, bc_val, bc_temp Time on [T], time off [T], specified volume flux (of liquid) [L3/T] multiplied by the heat capacity [J kg−1 K−1] and density [M/L3] of the
boundary medium, temperature of water entering [K].

Nodes in both the chosen faces and the currently active media (see Section 5.8.1) are assigned a time-variable temperature flux value.

Although a fluid volume flux bc_val is specified, this does not influence the flow solution in any way. It is merely intended to give the user a straightforward way to input a known amount of energy to the system, as a function of fluid volume and temperature.

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The following instructions are used to define the atmospheric inputs discussed in Section 2.6.1.10, and summarized in Equation 2.121.

1. ntime Number of panels in the time-variable, incoming shortwave radiation function. For each panel, enter the following:
(a) ton_val, value Time on [T], incoming shortwave radiation [M/T3], ${\displaystyle K}$  in Equation 2.122. Default value is 1.10 × 102 J/(m2 s).
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1. ntime Number of panels in the time-variable, sinusoidal incoming shortwave radiation function. For each panel, enter the following:
(a) ton_val, value, amp, phase, period Time on [T], vertical shift (mid-point incoming shortwave radiation, ${\displaystyle K}$  in Equation 2.122) [M/T3], amplitude [M/T3], phase,       period [T].
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## Cloud Cover

1. ntime Number of panels in the time-variable, cloud cover function. For each panel, enter the following:
(a) ton_val, value Time on [T], cloud cover [-], ${\displaystyle C_{c}}$  in Equation 2.124. Default value is 0.50.
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1. ntime Number of panels in the time-variable, incoming longwave radiation function. For each panel, enter the following:
(a) ton_val, value Time on [T], incoming longwave radiation [M/T3], ${\displaystyle L}$  in Equation 2.125. Default value is 3.0 × 102 J/(m2 s).
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## Temperature of Air

1. ntime Number of panels in the time-variable, air temperature function. For each panel, enter the following:
(a) ton_val, value Time on [T], air temperature [K], ${\displaystyle T_{a}}$  in Equation 2.126. Default value is 15°C.
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## Sinusoidal Temperature of Air

1. ntime Number of panels in the time-variable, sinusoidal air temperature function. For each panel, enter the following:
(a) ton_val, value, amp, phase, period Time on [T], vertical shift (mid-point temperature, ${\displaystyle T_{a}}$  in Equation 2.126) [K], amplitude [K], phase, period [T].
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These instructions are used to define the sensible heat flux ${\displaystyle Q_{h}}$  in Equation 2.128 and latent heat flux ${\displaystyle Q_{E}}$  in Equation 2.129.

## Density of Air

1. ntime Number of panels in the time-variable, air density function. For each panel, enter the following:
(a) ton_val, value Time on [T], density of air [M/L3], ${\displaystyle {\rho }_{a}}$  in Equation 2.128. Default value is 1.225 kg/m3.
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## Specific Heat of Air

1. ntime Number of panels in the time-variable, air specific heat function. For each panel, enter the following:
(a) ton_val, value Time on [T], specific heat of air [L2/(T2 K)], ${\displaystyle c_{a}}$  in Equation 2.128. Default value is 7.17 × 102 J/(kg °K).
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## Wind Speed

1. ntime Number of panels in the time-variable, wind speed function. For each panel, enter the following:
(a) ton_val, value Time on [T], wind speed [L/T], ${\displaystyle V_{a}}$  in Equation 2.128. Default value is 1.0 m/s.
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## Sinusoidal Wind Speed

1. ntime Number of panels in the time-variable, sinusoidal wind speed function. For each panel, enter the following:
(a) ton_val, value, amp, phase, period Time on [T], vertical shift (mid-point wind speed, ${\displaystyle V_{a}}$  in Equation 2.128) [L/T], amplitude [L/T], phase, period [T].
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## Drag Coefficient

1. ntime Number of panels in the time-variable, drag coefficient function. For each panel, enter the following:
(a) ton_val, value Time on [T], drag coefficient [-], ${\displaystyle c_{D}}$  in Equation 2.128. Default value is 2.0 × 10−3.
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## Latent Heat of Vapourization

1. ntime Number of panels in the time-variable, latent heat of vapourization function. For each panel, enter the following:
(a) ton_val, value Time on [T], latent heat of vapourization [L2/T2], ${\displaystyle L_{V}}$  in Equation 2.129. Default value is 2.258 × 106 J/kg.
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## Specific Humidity of Air

1. ntime Number of panels in the time-variable, air specific hunidity function. For each panel, enter the following:
(a) ton_val, value Time on [T], specific humidity of air [M/M], ${\displaystyle SH_{a}}$  in Equation 2.129. Default value is 0.01062.
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## Soil-Water Suction at Surface

1. ntime Number of panels in the time-variable, soil-water suction at surface function. For each panel, enter the following:
(a) ton_val, value Time on [T], soil-water suction at surface [L], ${\displaystyle {\psi }_{g}}$  in Equation 2.131. Default value is 0.138 m.
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## Saturation Vapour Pressure

1. ntime Number of panels in the time-variable, saturation vapour pressure function. For each panel, enter the following:
(a) ton_val, value Time on [T], saturation vapour pressure [M/(L T2)], ${\displaystyle e_{sat}[T_{g}]}$  in Equation 2.132. Default value is 1.704 × 103 Pa.
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## Relative Humidity

1. ntime Number of panels in the time-variable, relative humidity function. For each panel, enter the following:
(a) ton_val, value Time on [T], relative humidity [-]. Default value is 0.75.
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## Pressure of Air

1. ntime Number of panels in the time-variable, air pressure function. For each panel, enter the following:
(a) ton_val, value Time on [T], air pressure [M/L T2], ${\displaystyle p_{a}}$  in Equation 2.132. Default value is 1.013 × 105 Pa.
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