Thermal Science 2023 Volume 27, Issue 4 Part B, Pages: 3405-3411
https://doi.org/10.2298/TSCI2304405D
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Numerical simulation of slip behaviors and friction reduction effects in hydrophobic micro-channel in laminar flow conditions
Dogan Bekir (Tokat Vocational School, Tokat Gaziosmanpasa University, Tokat, Turkey), bekir.dogan@gop.edu.tr
Ozbey Mustafa (Faculty of Engineering, Ondokuz Mayis University, Samsun, Turkey)
Namli Lutfu (Faculty of Engineering, Ondokuz Mayis University, Samsun, Turkey)
Aybek Unsal (Tokat Vocational School, Tokat Gaziosmanpasa University, Tokat, Turkey)
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
Show references
Choi, C.-H., et al., Effective Slip and Friction Reduction in Nanograted Superhydrophobic Microchannels, Physics of Fluids, 18 (2006), 8, 087105
Kartal, F. E., Synthesis and Characterızatıon of Nanocomposite Superhydrofobic Surfaces, M.Sc. thesis, Gazi University, Ankara, Turkey, 2009
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
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
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
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
Kibar, A. Experimental Investigation of Behaviour of Water Jet Flow onto Hydrophobic Surfaces, M.Sc. thesis, Kocaeli University, Kocaeli, Turkey, 2008
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
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
Hao, P., et al., Laminar Drag Reduction in Hydrophobic Microchannels, Chem. Eng. Technol., 32 (2009), 6, pp. 912-918
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
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
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
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
Bhushan, B., et al., Fabrication and Characterization of the Hierarchical Structure for Superhydrophobi-city and Self-Cleaning, Ultramicroscopy, 109 (2009), 8, pp. 1029-1034
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