In this paper, the impact of distilled water drops on hydrophobic cylinders is characterized using both experiments and numerical simulations. Water drops of 2.54 mm in diameter impact with a velocity of 1 m/s on hydrophobic cylinders. The corresponding Reynolds and Weber numbers are 2800 and 34, respectively. Three different stainless steel cylinders with diameters of 0.48 mm, 0.88 mm, and 1.62 mm were used. The surfaces of the cylinders were made hydrophobic using a special coating spray. An experimental setup consisting of a drop generator, a high-speed camera, a lighting system, and a photoelectric sensor was used to capture images of the impact with a time-step of 1 ms. The images were then analyzed using an image processing technique implemented in the matlab software. Both the centric and off-centric impacts were studied for each cylinder diameter. A numerical simulation of the impact was also obtained using an open-source code called OpenFOAM by employing its InterFoam solver. The numerical scheme used by the solver is the volume-of-fluid (VOF) method. The predicted images of the simulations were compared well with those of the captured photographs both qualitatively and quantitatively for the entire experiments. The behavior of the drop after the impact and the subsequent deformation on hydrophobic cylinders including flow instabilities, liquid breakup, and secondary drops formation were observed from both simulations and experiments. By decreasing the cylinder diameter, the breakup occurs sooner, and a smaller number of secondary drops are formed.
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August 2019
Research-Article
Experimental and Numerical Characterization of Drop Impact on a Hydrophobic Cylinder
Javid Zohrabi Chakaneh,
Javid Zohrabi Chakaneh
Department of Mechanical Engineering,
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: javid.zohrabi@yahoo.com
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: javid.zohrabi@yahoo.com
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Seyed Javad Pishbin,
Seyed Javad Pishbin
Department of Mechanical Engineering,
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: Pb.javad74@gmail.com
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: Pb.javad74@gmail.com
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Alireza Sheikhi Lotfabadi,
Alireza Sheikhi Lotfabadi
Department of Mechanical Engineering,
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: Sheikhi.l.alireza@gmail.com
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: Sheikhi.l.alireza@gmail.com
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Mohammad Passandideh-Fard
Mohammad Passandideh-Fard
Department of Mechanical Engineering,
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: mpfard@um.ac.ir
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: mpfard@um.ac.ir
Search for other works by this author on:
Javid Zohrabi Chakaneh
Department of Mechanical Engineering,
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: javid.zohrabi@yahoo.com
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: javid.zohrabi@yahoo.com
Seyed Javad Pishbin
Department of Mechanical Engineering,
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: Pb.javad74@gmail.com
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: Pb.javad74@gmail.com
Alireza Sheikhi Lotfabadi
Department of Mechanical Engineering,
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: Sheikhi.l.alireza@gmail.com
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: Sheikhi.l.alireza@gmail.com
Mohammad Passandideh-Fard
Department of Mechanical Engineering,
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: mpfard@um.ac.ir
Ferdowsi University of Mashhad,
Mashhad 9177948974, Iran
e-mail: mpfard@um.ac.ir
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received June 23, 2018; final manuscript received January 20, 2019; published online March 11, 2019. Assoc. Editor: Samuel Paolucci.
J. Fluids Eng. Aug 2019, 141(8): 081112 (10 pages)
Published Online: March 11, 2019
Article history
Received:
June 23, 2018
Revised:
January 20, 2019
Citation
Zohrabi Chakaneh, J., Pishbin, S. J., Sheikhi Lotfabadi, A., and Passandideh-Fard, M. (March 11, 2019). "Experimental and Numerical Characterization of Drop Impact on a Hydrophobic Cylinder." ASME. J. Fluids Eng. August 2019; 141(8): 081112. https://doi.org/10.1115/1.4042666
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