Modeling of the onset of gas entrainment from a stratified two-phase region through two side branches

M. Ahmed, K. Lenard, Ibrahim Hassan, N. Esmail

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A theoretical analysis for the onset of gas pull-through (entrainment) during discharge from a stratified two-phase region through two vertically aligned side branches has been developed in this paper. Initially, a simplified point-sink model was developed; this was followed by the acquisition of a more accurate finite branch model. The predicted value of the critical height at the onset of gas entrainment was found to be a function of each branches' corresponding Froude number (Fr1 and Fr2), as well as the ratio between the vertical distance connecting the centerlines of the two branches and the diameter of the branches (L/d). The predicted values of the critical heights were found to be consistent with the corresponding experimental data at different values of Fr1 Fr2 and L/d. From the basis of the present models, it was established that when increasing the flow through the lower branch, the critical height increased for all values of Fr1 and L/d. In addition, it was found that increasing the vertical distance between the two branches, reduced the effects of the lower branch on the determination of the critical height.

Original languageEnglish
Title of host publicationProceedings of the 4th ASME/JSME Joint Fluids Engineering Conference: Volume 1, part B, Forums
EditorsA. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, M. Kawahashi
Pages1425-1431
Number of pages7
Volume1 B
Publication statusPublished - 2003
Externally publishedYes
Event4th ASME/JSME Joint Fluids Engineering Conference - Honolulu, HI, United States
Duration: 6 Jul 200310 Jul 2003

Other

Other4th ASME/JSME Joint Fluids Engineering Conference
CountryUnited States
CityHonolulu, HI
Period6/7/0310/7/03

Fingerprint

Air entrainment
Gases
Froude number
Discharge (fluid mechanics)

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Ahmed, M., Lenard, K., Hassan, I., & Esmail, N. (2003). Modeling of the onset of gas entrainment from a stratified two-phase region through two side branches. In A. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, & M. Kawahashi (Eds.), Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference: Volume 1, part B, Forums (Vol. 1 B, pp. 1425-1431)

Modeling of the onset of gas entrainment from a stratified two-phase region through two side branches. / Ahmed, M.; Lenard, K.; Hassan, Ibrahim; Esmail, N.

Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference: Volume 1, part B, Forums. ed. / A. Ogut; Y. Tsuji; M. Kawahashi; A. Ogut; Y. Tsuji; M. Kawahashi. Vol. 1 B 2003. p. 1425-1431.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ahmed, M, Lenard, K, Hassan, I & Esmail, N 2003, Modeling of the onset of gas entrainment from a stratified two-phase region through two side branches. in A Ogut, Y Tsuji, M Kawahashi, A Ogut, Y Tsuji & M Kawahashi (eds), Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference: Volume 1, part B, Forums. vol. 1 B, pp. 1425-1431, 4th ASME/JSME Joint Fluids Engineering Conference, Honolulu, HI, United States, 6/7/03.
Ahmed M, Lenard K, Hassan I, Esmail N. Modeling of the onset of gas entrainment from a stratified two-phase region through two side branches. In Ogut A, Tsuji Y, Kawahashi M, Ogut A, Tsuji Y, Kawahashi M, editors, Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference: Volume 1, part B, Forums. Vol. 1 B. 2003. p. 1425-1431
Ahmed, M. ; Lenard, K. ; Hassan, Ibrahim ; Esmail, N. / Modeling of the onset of gas entrainment from a stratified two-phase region through two side branches. Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference: Volume 1, part B, Forums. editor / A. Ogut ; Y. Tsuji ; M. Kawahashi ; A. Ogut ; Y. Tsuji ; M. Kawahashi. Vol. 1 B 2003. pp. 1425-1431
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