Heat Transfer of Two Phases (Water – Air) in Horizontal Smooth and Ribbed Ducts

Riyadh S. Al-Turaihi, Sarah Hasan Oleiwi


Computational fluid dynamics (CFD) was used to investigate the flow of water and air in smooth and ribbed duct. Temperature was applied for the top and the bottom of the duct where the ribs are located. The heat transfer coefficient were calculate at different location inside the ducts and the results was validated using several heat transfer coefficient correlations that was developed by other researchers. Three shapes of ribs was studied which are rectangular, trapezoidal, and triangle. Three water velocities and three air velocities was studied (0.4, 0.6, and 0.8 m/s), and (0.12, 0.15, and 0.18 m/s), respectively. The heat transfer coefficient increased by adding ribs, it also increased as the velocity of the flow increased.


Heat transfer, Ribbed duct, Two phase, Ansys Fluent, CFD

Full Text:



Ansari M. R., Gheisari R., and Azadi M., “Flow pattern change in horizontal rectangular laterally ribbed ducts through alteration of the ribs thickness and pitch”, International Journal of Multiphase Flow, vol. 54, pp. 11–21, 2013.

Ansari M.R., and Arzandi B., “Two-phase gas–liquid flow regimes for smooth and ribbed rectangular ducts”, International Journal of Multiphase Flow, vol. 38, pp.118–125, 2012.

Boukadoum A. B., and Benzaoui A., “CFD based analysis of heat transfer enhancement in solar air heater provided with transverse rectangular ribs", Energy Procedia, vol. 50, pp. 761-772, 2014.

Boyko L. D., and Kruzhilin G. N., " Heat transfer and hydrolic resistance during condensation of steam in a horizontal tube and in a bundle of tubes", Int. J. Heat Mass Transfer, vol. 10, pp. 361-373, 1967.

Coletti F., Jacono D. L., Cresci I., and Arts T., “Turbulent flow in rib-roughened channel under the effect of Coriolis and rotational buoyancy forces”, Physics of Fluids, vol. 26, 2014.

Fluent User’s Guide, Modeling Multiphase Flows, Fluent Inc. September 29, 2006.

Jaiswal S., and Aharwal K. R., “Three Dimensional CFD Analysis of Rectangular Roughened Channel”, International Journal of Engineering Research & Technology (IJERT), vol. 4, Issue 06, June-2015.

Kim D., “Improved Convective Heat Transfer Correlations for Two-Phase Two-Component Pipe Flow”, KSME International Journal, vol. 16, No.3, pp. 403- 422, 2002.

Kim D., and Ghajar A. J., “Heat transfer measurements and correlations for air–water flow of different flow patterns in a horizontal pipe”, Experimental Thermal and Fluid Science, vol. 25, pp. 659–676, 2002.

Komeil M. , Rohollah R., and Farhad T., “Effects of Rib Shapes on Heat Transfer Characteristics of Turbulent Flow of Al2O3-Water Nanofluid inside Ribbed Tubes”, Iran. J. Chem. Chem. Eng, vol. 34, No. 3, pp. 61-77, 2015.

Manca O. , Nardini S., and Ricci D., “Numerical Study of Air Forced Convection in a Chanel Provided with Inclined Ribs”, Frontiers in Heat and Mass Transfer (FHMT), 2011.

Martin B. W., and Sims G. E., “Forced Convection Heat Transfer to Water with Air Injection in a Rectangular Duct”, Int. J. Heat Mass Transfer. vol. 14, pp. 1115-I 134., 1971.

Mohan M. Vijay, “A STUDY OF HEAT TRANSFER IN TWO-PHASE TWO-COMPONENT FLOW IN A VERTICAL TUBE”, PhD. Eng. thesis, The University of Manitoba, Jan. 1999.

Sánta R., “The Analysis of Two-Phase Condensation Heat Transfer Models Based on the Comparison of the Boundary Condition”, Acta Polytechnica Hungarica, vol. 9, No. 6, pp. 167-180, 2012.

Serizawa A., Kataoka I., and Michiyoshi I., "Turbulence structure of air - water bubbly flow - III. Transport properties", Int. J. Multiphase flow, vol. 2, pp. 247-259, 1975.

Sieder E. N., and Tate G. E. , “Heat Transfer and Pressure Drop of Liquids in Tubes”, Ind. Eng. Chem., vol. 28, No. 12, pp. 1429-1435, 1936.

Song X.Q., Lin J.Z., Zhao J.F., and Shen T.Y., “Research on reducing erosion by adding ribs on the wall in particulate two-phase flows”, Wear, vol. 193, pp. 1-7, 1996.

Yemenici O., and Sakin A., “Numerical Investigation of Heat Transfer for Laminar and Turbulent Flow over Ribbed Walls”, International Journal of Engineering and Advanced Technology (IJEAT), vol. 2, pp. 163-166, Issue-6, August 2013.


  • There are currently no refbacks.

ISSN 2548 - 060X

@ 2013

 Publisher: Ilker Ors