THERMAL SCIENCE

International Scientific Journal

Bekir Dogan

,

Mustafa Ozbey

,

Lutfu Namli

,

Unsal Aybek

NUMERICAL SIMULATION OF SLIP BEHAVIORS AND FRICTION REDUCTION EFFECTS IN HYDROPHOBIC MICRO-CHANNEL IN LAMINAR FLOW CONDITIONS

ABSTRACT
In the study, a numerical simulation of the sliding properties of the rough and smooth surfaces with micro-structure was made. The simulation of shear flow in the micro-channel was performed with ANSYS FLUENT software. The 3-D and two-phase flow is simulated by choosing the volume of fluid model. In CFD analysis, water and air consist of two immiscible phases. In the calculations, if water is the first fluid and air is the second fluid, adjustments are made. At the beginning of the analysis, the channel was considered to be completely filled with air and the effect of gravity was ignored during the calculation. Water and air are considered Newtonian and incompressible fluids. In addition, laminar flow and steady-state calculations are made. It was found that the decrease in pressure drop increased with increasing distance between asperities (no-shear fraction). In the simulation results, approximately 14% of the velocity in the micro-channel axis was measured at the interface. The main purpose of this study is to evaluate the applicability of the volume of fluid model in a hydrophobic micro-channel flow designed in 3-D using ANSYS Fluent CFD software.
KEYWORDS
Ansys Fluent, sliding speed, volume of fluid, interface, micro-channel
PAPER SUBMITTED: 2023-02-15
PAPER REVISED: 2023-04-28
PAPER ACCEPTED: 2023-06-10
PUBLISHED ONLINE: 2023-09-17
DOI REFERENCE: https://doi.org/10.2298/TSCI2304405D
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 4, PAGES [3405 - 3411]
REFERENCES
  1. Choi, C.-H., et al., Effective Slip and Friction Reduction in Nanograted Superhydrophobic Microchannels, Physics of Fluids, 18 (2006), 8, 087105
  2. Kartal, F. E., Synthesis and Characterızatıon of Nanocomposite Superhydrofobic Surfaces, M.Sc. thesis, Gazi University, Ankara, Turkey, 2009
  3. Picella, F., et al., Laminar-Turbulent Transition in Channel Flow with Superhydrophobic Surfaces Modelled as a Partial Slip Wall, J. Fluid Mech., 881 (2019), Oct., pp. 462-497
  4. Picella, F., et al., On the Influence of the Modelling of Superhydrophobic Surfaces on Laminar-Turbulent Transition, J. Fluid Mech., 901 (2020), 901, A15-36
  5. Wang, J., et al., Slip Theory-Based Numerical Investigation of the Fluid Transport Behavior on a Surface with a Biomimetic Microstructure, Engineering Applications of Computational Fluid Mechanics, 13 (2019), 1, pp. 609-622
  6. Pehlivan, M., Ozbey, M., Experimental Investigation of the Effect of Hydrophobic Surfaces on Friction Losses in Turbulent Pipe Flows, Duzce University Journal of Science and Technology, 10 (2022), 3, pp. 1383-1397
  7. Kibar, A. Experimental Investigation of Behaviour of Water Jet Flow onto Hydrophobic Surfaces, M.Sc. thesis, Kocaeli University, Kocaeli, Turkey, 2008
  8. Wang, C., et al., Spray-Coated Superhydrophobic Surfaces with Wear-Resistance, Drag-Reduction and Anti-Corrosion Properties. Colloids and Surfaces A: Physicochem, Eng. Aspects, 514 (2017), Feb., pp. 236-242
  9. Watanabe, K., et al., Drag Reduction in Flow through Square and Rectangular Ducts with Highly Water-Repellent Walls., Transactions of the Japan Society of Mechanical Engineers, 62 (1996), Feb., pp. 3330-3334
  10. Hao, P., et al., Laminar Drag Reduction in Hydrophobic Microchannels, Chem. Eng. Technol., 32 (2009), 6, pp. 912-918
  11. Kandlikar, S G., Grande, W. J., Evolution of Microchannel Flow Passages-Thermohydraulic Performance and Fabrication Technology, Heat Transfer Eng., 24 (2003), 1, pp. 3-17
  12. Paz, C., et al., Analysis of the Volume of Fluid (VOF) Method for the Simulation of the Mucus Clearance Process with CFD, Computer Methods in Biomechanics and Biomedical Engineering, 22 (2019), 5, pp. 547-566
  13. Fatchurrohman N., Chia S.T., Performance of Hybrid Nano-Micro Reinforced Mg Metal Matrix Composites Brake Calliper: Simulation Approach, IOP Conf. Ser.: Mater. Sci. Eng., 257 (2017), Aug., 012060
  14. Zhu, J., et al., Numerical Simulation of Slip Characteristics of Superhydrophobic Surface, Proceedings, ACM ISBDAI Conference (ISBDAI'20), ACM, Johannesburg, South Africa, 2020, pp. 366-370
  15. Bhushan, B., et al., Fabrication and Characterization of the Hierarchical Structure for Superhydrophobi-city and Self-Cleaning, Ultramicroscopy, 109 (2009), 8, pp. 1029-1034
  16. Zhang, J., et al., Drag Reductions and the Air-Water Interface Stability of Superhydrophobic Surfaces in Rectangular Channel Flow, Physical Review E, 94 (2016), 5, 053117
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Numerical simulation of slip behaviors and friction reduction effects in hydrophobic micro-channel in laminar flow conditions

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence