Modelling and Simulation of Degassing Process

Alimi, Aria; Lübke, Martin; Wünsch, Olaf

doi:10.1002/pamm.201410284

Cited by 3 publications

(1 citation statement)

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“…Considering that the unwanted gas bubbles will damage the product quality, degassing operation is widely carried out to remove gas bubbles from highly viscous liquids in the fields of chemical industry, food, metallurgy and textile, etc. [2,3] However, when pushed up by buoyancy only, gas bubbles in highly viscous fluids are very difficult to be removed because of large drag resistance.…”

Section: Introductionmentioning

confidence: 99%

Application of low frequency vibration to degassing of highly viscous shear-thinning fluids

Zhan¹,

Shen²,

He³

et al. 2017

Vib. proced.

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Abstract. The removal of unwanted gas bubbles is an important operation in many processes. In this paper, the mechanism of the degassing of highly viscous fluids by low-frequency vibration is studied numerically using the computational fluid dynamics (CFD). The effects of vibration frequency and amplitude on the degassing rate are investigated. The results show that the superimposed mechanical vibration largely affects the degassing rate of shear-thinning fluids but exerts no effect on that of Newtonian fluids. The de-gassing rate of shear-thinning fluids depends on the vibration frequency and amplitude. What's more, low-frequency and small-amplitude vibration is particularly useful in re-moving gas bubbles from viscous shear-thinning fluids, however, high-frequency or large-amplitude vibration may intensify air entrapment and brings new gas bubbles into fluids.

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Section: Introductionmentioning

confidence: 99%