Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Impact and Solidification of the Liquid Metal Droplet in the Thermal Spray Deposition onto the Substrate with Surface Defects

표면 결함이 있는 모재에 대한 용사 공정에서 용응 금속 액적의 충돌현상과 응고 과정 해석

  • 하응지 (한양대학교 대학원 기계공학과) ;
  • 김우승 (한양대학교 기계공학과)
  • Published : 2002.11.01
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Abstract

In this study, numerical investigation has been performed on the impingement, spreading and solidification of a coating material droplet impacting onto a solid substrate in the thermal spray process. The numerical model is validated through the comparison of the present numerical result with experimental data fer the flat substrate without surface defects. An analysis of deposition formation on the non-polished substrate with surface defects is also performed. The parametric study is conducted with various surface defect sizes and shapes to examine the effect of surface defects on the impact and solidification of the liquid droplet on the substrate.

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References

  1. Poulikakos, D. and Waldvogel, J. M., 1996, 'Heat Transfer and Fluid Dynamics in the Process of Spray Deposition,' Adavances in Heat Transfer, Vol. 28, pp. 1-74 https://doi.org/10.1016/S0065-2717(08)70139-4
  2. Zhang, H., 1999, 'Theoretical Analysis of Spreading and Deposition', Int. J. Heat Mass Transfer, Vol.42, pp. 2499-2508 https://doi.org/10.1016/S0017-9310(98)00364-0
  3. Trapaga, G., Matthys, E. F., Valencia, J. J., and Szekely, J., 1992, 'Fluid Flow, Heat Transfer, and Solidification of Molten Metal Droplets Impinging on Substrate: Comparison of Numerical and Experimental Results,' Metall. Trans. B, Vol. 23B, pp. 701-718 https://doi.org/10.1007/BF02656450
  4. Delplanque, J. P., Lavernia, E. J., and Rangel, R. H., 1996, 'Multiderectional Solidification Model for the Description of Micropore Formation in Spray Deposition Processes,' Num. Heat Transfer Vol. 30A, pp.1-18 https://doi.org/10.1080/10407789608913825
  5. Pasandideh-Fard, M., Bhola, R., Chandra, and S., Mostaghimi, J., 1998, 'Deposition of Tin Droplets on a steel plate: Simulations and Experiments,' Int. J. Heat Mass Transfer, Vol. 41, pp. 2929-2945 https://doi.org/10.1016/S0017-9310(98)00023-4
  6. Aziz, S. D. and Chandra, S., 2000, 'Impact, Recoil and Splashing of Molten Metal Droplets,' Int. J. Heat Mass Transfer, Vol 43, pp. 2841-2857 https://doi.org/10.1016/S0017-9310(99)00350-6
  7. Tong, A. Y. and Holt, B. R., 1997, 'Numerical Study on the Solidification of Liquid Metal Droplets Impactiong onto a Substrate,' Num. Heat Transfer, Vol. 31A, pp. 797-817 https://doi.org/10.1080/10407789708914065
  8. RIPPLE: A Computer Program for Incompressible Flows with Free Surfaces https://doi.org/10.2514/3.11286
  9. Swaminathan, C. R. and Voller, V. R., 1993, 'On the Enthalpy Method.' Int. J. Num. Meth. Heat Fluid Flow, Vol. 3, pp. 233-244 https://doi.org/10.1108/eb017528
  10. Brackbill, J. U., Kothe, D. B. and Zemach, c., 1992, 'A Continuum Method for Modeling Surface Tension,' J. Comput. Phys., Vol. 100, pp. 335-354 https://doi.org/10.1016/0021-9991(92)90240-Y
  11. Rider, W. J. and Kothe, D. B., 1998, 'Reconstructing Volume Tracking,' J. Comput. Phys., Vol. 141, pp. 112-152 https://doi.org/10.1006/jcph.1998.5906