Velocity characteristics of turbulent natural convection in symmetrically and asymmetrically heated vertical channels

Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels, for high Rayleigh numbers

“…Before presenting the numerical results obtained for heat transfer in channels with symmetrical heating, a comparison with the results proposed in [7,15,5,25,11] has been carried out.…”

“…Some of their results are presented in Figure 5. In [25] it was concluded that the flow was turbulent for Ra L ≥ 10 5 , as Boudjemadi et al [28] proposed. However, these authors centered their studies in vertical slots, not in open channels.…”

“…So, some differences with respect to symmetric heating conditions in channels may be appreciated. Habib et al [25] studied experimentally the problem of turbulent heat transfer in channels with plates heated asymmetrically at uniform temperature. They presented results of velocity profiles in different sections of the channel and compared these results with those proposed in [13].…”

Effect of adiabatic square ribs on natural convection in an asymmetrically heated channel

“…Habib et al [8] performed experimentally velocity measurements using a Laser Doppler Anemometer for turbulent natural convection flow in heated vertical channels of two boundary conditions (i) symmetrically heated where the two plates have the same temperature higher than that of air and (ii) asymmetrically heated where one plate has constant temperature higher than that of air and the other plate has temperature lower than that of ambient air. Their results showed that in the case of symmetrical flow, a reversed flow at the center of the channel close to the channel exit was detected.…”

“…Equations (5)- (8) have been obtained from their dimensional counterparts by using the following dimensionless quantities:…”