Dynamics of bubbles rising in viscoelastic liquids and birefringence measurement in the presence of a surfactant

IF 2.8 2区工程技术 Q2 MECHANICS

Journal of Non-Newtonian Fluid Mechanics Pub Date : 2025-07-17 DOI:10.1016/j.jnnfm.2025.105458

Pınar Eribol , Arda Inanc , Ebru Sarioglu , Erkan Senses , A. Kerem Uguz

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Abstract

A comprehensive study was conducted on the dynamics of bubbles in a 0.10–0.40 wt% polyacrylamide (PAAM) solution in the presence and absence of a surfactant, considering various shape parameters and dimensionless numbers, for a broad range of bubble volumes, from 5 to 2000 mm³. A detailed rheological analysis is performed for the chemical solutions. A safe injection period is determined such that a bubble is unaffected by another one. Unsteady results are presented. Steadiness of the bubble is checked for various shape parameters, and safe column length is determined. Uncertainty analysis is also performed. Cusp formation at the bubble tail and its correlation with the surrounding stress were assessed using flow birefringence. No discontinuity in bubble velocity is reported. As the water-soluble surfactant, sodium dodecyl sulfate (SDS), is added at 10 and 100 ppm concentration, the bubbles stretch out more in the vertical direction, and cusp formation commences at a lower volume and is more pronounced.

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粘弹性液体中气泡上升的动力学及表面活性剂存在下的双折射测量

在0.10-0.40 wt%的PAAM溶液中，考虑到各种形状参数和无因次数，在5 - 2000 mm3的气泡体积范围内，对存在和不存在表面活性剂的气泡动力学进行了全面研究。对化学溶液进行了详细的流变分析。安全注入周期的确定使得一个气泡不受另一个气泡的影响。给出了非定常结果。对各种形状参数进行了气泡稳定性校核，并确定了安全柱长。并进行了不确定度分析。用流动双折射法评价了气泡尾部尖点的形成及其与周围应力的相关性。气泡速度无间断现象。当水溶性表面活性剂十二烷基硫酸钠（SDS）在10 ppm和100 ppm浓度下添加时，气泡在垂直方向上伸展得更大，尖头形成的体积更小，而且更明显。

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来源期刊

Journal of Non-Newtonian Fluid Mechanics 物理-力学

CiteScore

5.00

自引率

19.40%

发文量

109

审稿时长

61 days

期刊介绍： The Journal of Non-Newtonian Fluid Mechanics publishes research on flowing soft matter systems. Submissions in all areas of flowing complex fluids are welcomed, including polymer melts and solutions, suspensions, colloids, surfactant solutions, biological fluids, gels, liquid crystals and granular materials. Flow problems relevant to microfluidics, lab-on-a-chip, nanofluidics, biological flows, geophysical flows, industrial processes and other applications are of interest. Subjects considered suitable for the journal include the following (not necessarily in order of importance): Theoretical, computational and experimental studies of naturally or technologically relevant flow problems where the non-Newtonian nature of the fluid is important in determining the character of the flow. We seek in particular studies that lend mechanistic insight into flow behavior in complex fluids or highlight flow phenomena unique to complex fluids. Examples include Instabilities, unsteady and turbulent or chaotic flow characteristics in non-Newtonian fluids, Multiphase flows involving complex fluids, Problems involving transport phenomena such as heat and mass transfer and mixing, to the extent that the non-Newtonian flow behavior is central to the transport phenomena, Novel flow situations that suggest the need for further theoretical study, Practical situations of flow that are in need of systematic theoretical and experimental research. Such issues and developments commonly arise, for example, in the polymer processing, petroleum, pharmaceutical, biomedical and consumer product industries.