Unsteady Mixed Convection in a Cubic Lid-Driven Cavity Partially Heated from the Bottom
Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
Volume 57, No. 2, May 2019, Pages 275-287
Eutamene Salim1, Boudebous Saadoun2, Berrahil Farid3, Kholai Omar4, Dahdi Bachir1, Filali Abdelkader5,*
1 Département de Génie Mécanique, Université Mentouri Constantine, Route de Ain El Bey, 25000, Constantine, Algérie
2 Département Génie Mécanique, Université Oum El Bouaghi, Algérie
3 Département des Sciences et Techniques, Faculté des Sciences et de la Technologie, Centre Universitaire Abdelhafid Boussouf – Mila, Algérie
4 Département de Génie des Transport, Université Mentouri Constantine, Route de Ain El Bey, 25000, Constantine, Algérie
5 Département Génie Mécanique, Ecole National Polytechnique de Constantine ENPC, Constantine, Algérie
*Corresponding author: email@example.com
Eutamene, Salim, et al. "Unsteady Mixed Convection in a Cubic Lid-Driven Cavity Partially Heated from the Bottom." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 57.2 (2019): 275-287.
Eutamene, S., Boudebous, S., Berrahil, F., Kholai, O., Dahdi, B., & Filali, A.(2019). Unsteady Mixed Convection in a Cubic Lid-Driven Cavity Partially Heated from the Bottom. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 57(2), 275-287.
Eutamene Salim, Boudebous Saadoun, Berrahil Farid, Kholai Omar, Dahdi Bachir, and Filali Abdelkader."Unsteady Mixed Convection in a Cubic Lid-Driven Cavity Partially Heated from the Bottom." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. 57, no. 2 (2019): 275-287.
Eutamene, S., Boudebous, S., Berrahil, F., Kholai, O., Dahdi, B., Filali, A., 2019. Unsteady Mixed Convection in a Cubic Lid-Driven Cavity Partially Heated from the Bottom. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 57(2), pp. 275-287.
Eutamene S, Boudebous S, Berrahil F, Kholai O, Dahdi B, Filali, A. Unsteady Mixed Convection in a Cubic Lid-Driven Cavity Partially Heated from the Bottom. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. 2019;57(2): 275-287.
Mixed Convection; Cubic Lid-Driven Cavity; Finite Volume method; Richardson number
A numerical study of transient laminar mixed convection heat transfer characteristics confined within a square (2D) and cubic shape (3D) lid-driven cavity has been carried out. Lateral walls are maintained at a constant cold temperature and move upwards with a constant velocity. A heat source is located at the center of the bottom wall of the cavity and maintained at a constant high temperature. All the remaining parts of the cavity are considered adiabatic. The general conservation equations are discretized according to the Finite Volume method based on the SIMPLER algorithm. Richardson number (Ri) is varied from 0.1 to 10 and the competition between the natural and forced convection forces can lead the flow to adopt, under certain conditions, intricate behaviours such as loss of symmetry, bifurcations and so on. Obtained results showed that the critical Ri numbers that characterize the transition from the forced convection (two symmetric vortices) to the mixed convection (two asymmetric vortices) happens at Ri = 2.51 and Ri = 4.7 for the 3D and 2d cases, respectively. Then, the second transition from mixed convection to natural convection (four symmetrical vortices) happens at Ri = 6.29 and Ri = 7 for the 3D and 2d cases, respectively. Results indicated also that the heat transfer process was strongly affected by the dominant heat convection regime in which the rate of heat transfer increased in the case of asymmetric branch which is characterized by a dominance of natural convection mode.
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