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For a flat plate, d is length parallel to the flow. For cylinders that are normal to the flow, d is the diameter. For spheres, d is the diameter. Values for Nu are deter-mined experimentally. When air blows around an object (forced convection), the flow can be turbulent or viscous (laminar).
In meteorology, the term 'sensible heat flux' means the conductive heat flux from the Earth's surface to the atmosphere. [6] It is an important component of Earth's surface energy budget. Sensible heat flux is commonly measured with the eddy covariance method.
25 lis 2010 · Sensible Heat Flow - SI-Units. The sensible heat flow can be expressed in SI-units (metric) as. Q s = c p ρ q Δt / 3600 (1) where. Q s = sensible heat flow (kW) c p = 1.005* - specific heat air (kJ/kg K) ρ = 1.202* - air density at standard conditions (kg/m 3) q = air flow (m 3 /hr) Δt = temperature (o C)
surface temperature interacts with the sensible and latent heat fluxes so that the surface boundary condition is really the energy balance of the surface, which is coupled to the atmosphere. Lastly,
The sensible and water vapor heat fluxes derived above for bare soil and soil beneath canopy are based on the ground surface temperature from the previous time step and are used as the surface forcing for the solution of the soil temperature equations (section 2.6.1).
The surface vertical kinematic fluxes of momentum \(\overline{u'w'}\) and \(\overline{v'w'}\) (m 2 s-2), sensible heat \(\overline{\theta 'w'}\) (K m s -1), and latent heat \(\overline{q'w'}\) (kg kg-1 m s-1), where \(u'\), \(v'\), \(w'\), \(\theta '\), and \(q'\) are zonal horizontal wind, meridional horizontal wind, vertical velocity ...
At the surface net radiation Rn is partitioned into the sensible heat flux H, the latent heat flux λE and the ground heat flux G through the energy balance (Equation 4). E is also called evapotranspiration and λ = 2.5 · 106 J kg−1 is the latent heat of evaporation of water.
