Forced convection heat transfer on a heated bottom surface of cavity with different wall-height

Review-Heat Transfer Inside Cavity Flows Trends

“…• For cavity height ratio D2/D1= 0.8 and 1.0, higher values of h occur at the downstream position of the bottom surface of the cavity compared to those in aspect ratios ≤ 0.6. Yamamoto et al [34] also found that in deep cavities for D2/D1= 0.8 and 1.0, a single vortex develops inside the cavity, a shear force is created and affects the flow inside the cavity, and consequently influences the heat transfer at the cavity bottom surface. While for aspect ratios ≤ 0.6, the separation of the recirculating flow allows an additional vortex to occur.…”

“…Previously mentioned studies worked on demonstrating the effect of the aspect ratio of the cavity flow behaviour, however, the cavity height ratio is important as much as the aspect ratio in changing the flow dynamics and thus affecting the flow behavior. Yamamoto et al [34] investigated the convective heat transfer phenomena from a bottom-heated cavity but with different wall height, in which the upstream cavity wall-height 'D1' was kept unchanged and the downstream cavity wall-height 'D2' was changed from zero to D1.…”

“…Therefore, the flow inside the cavity varies with the cavity configuration and flow characteristics, which makes it difficult to obtain correlations that relate the Nusselt number to ReD. Yamamoto et al [34] revealed that it is difficult to obtain a collective correlation between the Nusselt number and the Reynolds number at each D2/D1, since on each cavity a laminar, transient and turbulent heat transfer is detected when varying the Reynolds number. Thus, the table 2 shows the correlation obtained partly on one of these three heat transfer cases for each cavity.…”

“…Table 2. The Correlation between ( Nu ) and ReD [34] The authors suggested that if this frequency is close to the frequency of the cavity shear layer instability, an intensification of the heat transfer occurs. The results obtained by Gertsenshtein & Krasnopol'skii [35] were found to be in good agreement with the experimental data obtained in [30].…”

“…Furthermore, extensive experimental investigations were performed by D'yachenko et al [44][45][46] to study the flow dynamic and heat transfer characteristics of a transverse cavity with an aspect ratio of L/H=3. In [33,34], the cavity's bottom surface was the only one that was heated, and the heat transfer was studied at the central cross section of the cavity. Yet in [44][45][46], the two side-walls and the bottom surface were heated and the local heat transfer coefficients for the entire surface were measured, and the range of the angles of inclination φ was expanded.…”