흡착식 유회수기 표면에 부착된 유막의 안정성 해석

A stability analysis of oil film on an adhesion-type oil skimmer

  • 현범수 (해양대학교 조선해양공학부) ;
  • 김장환 (미국 버클리대 방문연구원)
  • 발행 : 1997.07.01

초록

To determine an operational condition of an adhesion-type oil skimmer, it is important to estimate the withdrawal rate for a given driving velocity of the skimmer and material properties of the oil. As a theoretical model for this problem the formation of an oil film on a vertically driven flat plate is investigated. The previous steady-state analysis made in the field of coating industry are reviewed. These studies have been made under the assumptions of small Reynolds and capillary number, which is adequate for coating process but not for oil skimming. An alternative analysis based on the linear stability theory is made. Comparisons with the experimental results reveal that the stability analysis gives a correct estimation of the withdrawal rate for high capillary number at which the previous theory losses its validity.

키워드

참고문헌

  1. 최종보고서 해양오염 방제기술개발 (Ⅰ) 현범수
  2. AIChE J v.31 no.9 Wave formation on a vetical falling liquid film Alekseenko, S.V.;Nakoryakov, V.Ye;Pokusaev, B.G.
  3. J Fluid Mech. v.250 Nonlinear evolution of waves on a vertically falling film Chang, H.C.;Demekhin, E.A.;Kopellevich, D.E.
  4. J. Fluid Mech. v.168 Gravity and shear wave stability of free surface flows. Part Ⅰ. Numerical calculations Chin, R.W.;Abernathy, F.H.;Bertschy, J.R.
  5. Acta Physicochim. v.17 Dragging of a liquid by a moving plate Landau, L.;Levich, B.
  6. I & EC Fundamentals v.16 Some theoretical and experimental observation of the wave structure of falling liquid films Pierson, R.W.;Whitaker, S.
  7. Ann. Rev. Fluid Mech. v.17 Coating flows Ruschak, K.J.
  8. Chem. Eng. Sci. v.29 Free coating of a Newtonian liquid onto a vertical surface Spiers, R.P.;Subbaraman, C.V.;Wilkinson, W.L.
  9. Chem. Eng. Sci. v.20 Theory of drag out of liquids on flat plates White, D.A.;Tallmadge, J.A.