NUMERICAL SIMULATION OF THE MOTION OF DROPS ON AN INCLINED SURFACE

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TAFRESHI M.M.; MORTAZAVI S.

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Journal: IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING Year:2013 | Volume:37 | Issue:M2 (MECHANICAL ENGINEERING) Page(s): 119-131

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Title

NUMERICAL SIMULATION OF THE MOTION OF DROPS ON AN INCLINED SURFACE

Author(s)

TAFRESHI M.M. | MORTAZAVI S. | Issue Writer Certificate

Keywords

REYNOLDS NUMBER

CAPILLARY NUMBER

DENSITY RATIO

INCLINATION ANGLE

BOND NUMBER

EQUILIBRIUM POSITION

Abstract

The flow of two-dimensional drops suspended in an inclined channel is studied by numerical simulations at non-zero REYNOLDS NUMBERs. The flow is driven by the acceleration due to gravity, and there is no pressure gradient in the flow direction. The EQUILIBRIUM POSITION of a drop is studied as a function of the REYNOLDS NUMBER, the CAPILLARY NUMBER, the INCLINATION ANGLE and the DENSITY RATIO. It is found that the drop always lags the undisturbed flow. More deformable drops reach a steady state EQUILIBRIUM POSITION that is farther away from the channel floor. For drops that are heavier than the ambient fluid, the EQUILIBRIUM POSITION moves away from the channel floor as the REYNOLDS NUMBER is raised. The same trend is observed when the INCLINATION ANGLE with respect to horizontal direction increases. The behavior agrees with computational modeling of chute flow of granular materials. A drop that is lighter than the ambient fluid reaches a steady state EQUILIBRIUM POSITION closer to the channel floor when the REYNOLDS NUMBER or INCLINATION ANGLE increases. Simulations of 40 drops in a relatively large channel, show that drops move away from the channel floor when the DENSITY RATIO is larger than unity.

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APA: Copy

TAFRESHI, M.M., & MORTAZAVI, S.. (2013). NUMERICAL SIMULATION OF THE MOTION OF DROPS ON AN INCLINED SURFACE. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, 37(M2 (MECHANICAL ENGINEERING)), 119-131. SID. https://sid.ir/paper/684328/en

Vancouver: Copy

TAFRESHI M.M., MORTAZAVI S.. NUMERICAL SIMULATION OF THE MOTION OF DROPS ON AN INCLINED SURFACE. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING[Internet]. 2013;37(M2 (MECHANICAL ENGINEERING)):119-131. Available from: https://sid.ir/paper/684328/en

IEEE: Copy

M.M. TAFRESHI, and S. MORTAZAVI, “NUMERICAL SIMULATION OF THE MOTION OF DROPS ON AN INCLINED SURFACE,” IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, vol. 37, no. M2 (MECHANICAL ENGINEERING), pp. 119–131, 2013, [Online]. Available: https://sid.ir/paper/684328/en

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