The Strouhal, Nusselt numbers
are also calculated in this work.
The results showed that the averaged Nusselt numbers
decrease with increasing jet-to-plate spacing when 1 < H/d < 4.
Caption: Figure 7: Local Nusselt numbers
for different (a) slip parameter with Cr = 0.
7) The local data obtained with the TLCs were averaged over the rectangular sensor area for comparison with the Nusselt numbers
obtained by measurements with the heat flux sensor.
For all stable cases that have been investigated, the mean Nusselt numbers
increase very slightly as a function of Rayleigh number.
It was found that the average Nusselt numbers
with uniform energy dissipation (UED) in the cylinder were about 11% lower than those with constant heat flux (CHF) boundary condition and approximately 4% higher than those with constant surface temperature (CST) boundary condition.
The Nusselt numbers
are found from the correlations given in (4) for each surfaces.
The current work concentrates on understanding the scaling that influences the creation of these two distinct regions, and the development of predictive correlations for both friction factors and Nusselt numbers
Based on a roughness-viscosity model, they explained that the numerically predicted Nusselt numbers
are smaller than the experimentally determined ones.
The performance of these jets is evaluated in terms of the measured increases in the values of the local Nusselt numbers
and the uniformity of their radial distributions on the impinged surface.
Laminar flow regimes in the peripheral pipes giving constant Nusselt numbers
and almost constant heat transfer coefficients make the average borehole thermal resistance of the multi-pipe design vary very little with the flow rate.
In the laminar region of Reynolds number investigated, the measured local Nusselt numbers
agreed with classical developing flow theory.