Skip to Main content Skip to Navigation
Conference papers

Interaction between a bubbly flow and a moving obstacle

Abstract : The present paper investigates the interaction between a bubbly flow and an obstacle (sphere or cylinder). The goal is to calculate the force exerted by the bubbly flow on a transverse obstacle. To do this, the bubbly fluid is described with the help of the Kogarko, Iordanski and Van Wijngaarden model. The flow is assumed to be potential. The resolution of the motion equations leads to a 'wave equation' satisfied by the velocity potential. Coupled with the boundary conditions, we solve this equation in two situations. First, in permanent regime, we prove that the force exerted on the obstacle is equal to zero, generalizing the d'Alembert paradox. Second, we consider the harmonic vibrations of the obstacle. Then, we derive an analytic expression of the force which is the sum of two terms, the added mass and a friction force due to the compressibility of the gas bubbles. More, we prove that this force increases with the void fraction.
Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-02355366
Contributor : Amplexor Amplexor <>
Submitted on : Monday, December 2, 2019 - 5:35:29 PM
Last modification on : Tuesday, April 28, 2020 - 11:28:14 AM
Long-term archiving on: : Tuesday, March 3, 2020 - 1:07:24 PM

File

200600006939.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : cea-02355366, version 1

Collections

Citation

N. Chikhi, Sylviane Pascal-Ribot. Interaction between a bubbly flow and a moving obstacle. ICONE-15, Apr 2007, Nagoya, Aichi, Japan. ⟨cea-02355366⟩

Share

Metrics

Record views

27

Files downloads

14