THE SPREADING PROFILE OF AN IMPINGING LIQUID JET ON THE HYDROPHOBIC SURFACES

Year 2018, Volume: 36 Issue: 3, 609 - 618, 01.09.2018

Ali Kibar Kadri Süleyman Yiğit

Abstract

In this study, the spreading profiles of the impinging liquid jets on the superhydrophobic/hydrophobic surfaces have been examined experimentally and predicted using experimental data. The liquid jet is sent on the flat and smooth hydrophobic surfaces, which have 93, 104 and 117° contact angles, using the glass tube nozzle with the 1.75 mm inner diameter. The inclination angles between the jet and surface are altered in the range of 15-45°. The predicted profiles compared with the experimental data. The spreading behaviour of the impinging liquid jet on the hydrophobic surface is clarified using the predicted equation. The inclination angle is a dominant parameter for the profile of the spreading liquid. The predicted equation is in a good agreement with the experiments. The front length of the spreading liquid takes the maximum value at a critical inclination angle.

Keywords

Liquid jet, hydrophobic surface, spreading profile, impinging jet

References

• [1] Moulson JBT, Green SI (2013) Effect of ambient air on liquid jet impingement on a moving substrate. Phys Fluids 25:102106.
• [2] Wang T, Davidson JF, Wilson DI 2015) Flow patterns and cleaning behaviour of horizontal liquid jets impinging on angled walls. Food Bioprod Process 93:333–42.
• [3] Craik ADD, Latham RC, Fawkes MJ, Gribbon PWF (1981) The circular hydraulic jump. J Fluid Mech 112:347–62.
• [4] Maynes D, Johnson M, Webb BW (2011) Free-surface liquid jet impingement on rib patterned superhydrophobic surfaces. Phys Fluids 23:52104.
• [5] Kibar A, Karabay H, Yiǧit KS, Ucar IO, Erbil HY (2010) Experimental investigation of inclined liquid water jet flow onto vertically located superhydrophobic surfaces. Exp Fluids 1135–45.
• [6] Kibar A (2016) Experimental and numerical investigations of the impingement of an oblique liquid jet onto a superhydrophobic surface: energy transformation. Fluid Dyn Res 48:015501.
• [7] Kibar A (2017) Experimental and numerical investigation of liquid jet impingement on superhydrophobic and hydrophobic convex surfaces. Fluid Dyn Res 49:015502.
• [8] Kibar A (2018). Experimental and numerical investigation on a liquid jet impinging on a vertical superhydrophobic surface: spreading and reflection. Prog Comput Fluid Dyn An Int J 18:150–63.
• [9] Mertens K, Putkaradze V, Vorobieff P (2005) Morphology of a stream flowing down an inclined plane. Part 1. Braiding. J Fluid Mech 531:49–58.
• [10] Bush JWM, Hasha AE 2004 On the collision of laminar jets: fluid chains and fishbones. J Fluid Mech 511:285–310.
• [11] Bremond N, Villermaux E (2006) Atomization by jet impact. J Fluid Mech 549:273.
• [12] Inamura T, Shirota M (2014) Effect of velocity profile of impinging jets on sheet characteristics formed by impingement of two round liquid jets. Int J Multiph Flow 60:149–60.
• [13] Kate RP, Das PK, Chakraborty S (2007) Hydraulic jumps due to oblique impingement of circular liquid jets on a flat horizontal surface. J Fluid Mech 573:247–63.
• [14] Wang T, Faria D, Stevens LJ, Tan JSC, Davidson JF, Wilson DI (2013) Flow patterns and draining films created by horizontal and inclined coherent water jets impinging on vertical walls. Chem Eng Sci 102:585–601.
• [15] Aouad W, Landel JR, Dalziel SB, Davidson JF, Wilson DI (2016) Particle image velocimetry and modelling of horizontal coherent liquid jets impinging on and draining down a vertical wall. Exp Therm Fluid Sci 74:429–43.