Heat transfer in bubble layers at high pressures

Avdeev, A. A.; Balunov, B. F.; Kiselev, V. I.

doi:10.1016/0894-1777(92)90116-m

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…They proposed a new correlation for heat transfer coefficient from wall to gas-liquid to account for this inhibition of heat transfer rate by correcting the correlation developed by Deckwer [1]. Avdeev et al [6] conducted experimental investigation of heat transfer from gas-liquid flow to an immersed cooling surface to study the effect of pressure on gas-liquid to wall heat transfer. Their study suggests that the heat transfer correlation developed by Deckwer [1] at standard atmospheric pressure condition under predicts the heat transfer to the surface by 30%, hence a modified correlation is proposed in their work, which considers the effect of pressure on the heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Computational Study of the Effect of Homogeneous and Heterogeneous Bubbly Flows on Bulk Gas–Liquid Heat Transfer

Panicker¹,

Passalacqua

Fox

2020

Journal of Fluids Engineering

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A numerical investigation is performed on buoyancy driven homogeneous and heterogeneous bubbly flows to compare the bulk gas-liquid heat transfer effectiveness for Prandtl (Pr) numbers 0.2 - 20 and bubble void fractions 0.3 - 0.5. For this purpose, transient two-fluid model simulations of bubbles rising in a stagnant pool of liquid are conducted in a rectangular box by applying periodic boundary conditions to all the sides. The temperature difference between gas and liquid phase is averaged over the rectangular box and monitored with respect to time, the heat transfer rate is studied based on the time at which the temperature difference tends to zero. The results of numerical study show that at low Pr numbers, faster decay of temperature difference is observed for homogeneous flow of bubbles indicating higher heat transfer rate in comparison with the heterogeneous flow of bubbles for the same void fraction. On the contrary, for high Pr numbers higher heat transfer rate is observed in heterogeneous flow compared to the homogeneous. The comparison of heat transfer behavior between different void fraction for heterogeneous flow show that, for low Pr numbers higher heat transfer rate is achieved for void fraction 0.4 in comparison with void fraction 0.5. And for high Pr numbers, higher heat transfer is observed for void fraction 0.5 in comparison with void fraction 0.4.

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Section: Introductionmentioning

confidence: 99%