Bubble Dynamics-Based Modeling of the Cavitation Dynamics in Lubricated Contacts

Geike, Thomas

doi:10.22190/fume210112027g

Cited by 5 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Khanafer et al [45] conducted Nk5000 code to explore the effect in streamlines and isotherms with changing parameters and showed that the rotational speed expressively enhances overall heat throughout the fluid than other parameters such as Ri and Re number. Geike [46] reported the cavitation phenomena in the viscoelastic fluid flows. Dolon et al [47] studied the flow analyses as well as the centrifugal influence in the duct size.…”

Section: Validation Of the Studymentioning

confidence: 99%

Effects of Rotation on Unsteady Fluid Flow and Forced Convection in the Rotating Curved Square Duct With a Small Curvature

et al. 2022

View full text Add to dashboard Cite

In recent years, the analysis of flow disposition in a curved duct (CD) has greatly attracted researchers because it is broadly used in engineering devices. In the present paper, unsteady flow characteristics of energy transfer (HT) in a rotating curved square duct (CSD) have been presented with the aid of spectral method. The key purpose of this study is to explore rotational effects and heat transfer (HT) of the duct. For this purpose, time-evolution calculation is performed over the Taylor number (-1500 ≤ Tr ≤ 1500) and other parameters are fixed; e.g., Dean number (Dn = 1000), Curvature (δ = 0.015) and Prandtl number (Pr = 7.0, for water). Firstly, time-dependent behavior is accomplished for both clockwise and anticlockwise rotations. It is found that the flow instabilities are certainly governed by the change of Tr that has been justified by sketching phase spaces (PS). To observe the flow features, velocities including axial flow (AF), secondary flow (SF) and temperature profiles are disclosed for both rotations; and it is elucidated that 2- to 6-vortex solutions are generated for physically realizable solutions. Axial flow (AF) shows that two maximum-velocity regimes are produced which induces secondary flow (SF), and, consequently, a strong bonding between the AF and SF has been built up. It is observed that as the rotation is increased, the fluid is mixed considerably which boosts HT in the fluid. Finally, an assessment between the numerical and experimental data has been given, and a good agreement is observed.

show abstract

Section: Validation Of the Studymentioning

confidence: 99%

Effects of Rotation on Unsteady Fluid Flow and Forced Convection in the Rotating Curved Square Duct With a Small Curvature

et al. 2022

View full text Add to dashboard Cite

show abstract

“…They revealed that reducing the cavitation number leads to a decrease in the frequency of cavity shedding. Geike [31] calculated macroscopic forces between moving rough surfaces, and the tensile stresses that affect the wear in mixed lubrication applications, and developed a model for the numerical simulation of cavitation in mixed lubrication contacts that reproduces tensile stresses on short time scales. Moreover, they identified that lower cavitation numbers correlate with higher pressure pulsations.…”

Section: Introductionmentioning

confidence: 99%

Experiments on Cavitation Control around a Cylinder Using Biomimetic Riblets

Kadivar,

Dawoodian,

Lin

et al. 2024

JMSE

View full text Add to dashboard Cite

Experimental investigations were conducted to uncover the impact of cavitation control—through the use of biomimetic riblets on cavitating flows around a circular cylinder. First, the dynamics of cavitation in the flow behind a finite cylinder (without riblets) was unveiled by visualizing the cavitation clouds and measuring the lift force fluctuations acting on the cylinder. Second, in a significant step forward, a comprehensive explanation was provided for the cavitation control methods using two bio-inspired riblet morphologies positioned in different orientations and locations on the cylinder. For the first time, the impacts of these tiny formations on the flow dynamics and the associated cavitation process were scrutinized. This showed that scalloped riblets, with their curved design, induced secondary vortices near their tips and distorted primary streamwise vortices, and that high velocity gradients near the jagged pattern peaks of sawtooth riblets delayed flow separation, which affected cavitation.

show abstract

“…Previous studies on the microbubble dynamics near curved boundaries mainly paid attention to the bubble shape evolution and micro jet and the influence of the curvature of the curved boundary on the bubble motion. However, most early studies, as well as current work, focus on one-way coupled fluidstructure interaction with the rigid boundary [1][2][3][4] [5] [6]. We still have a lot of knowledge about two-way coupling to study.…”

Section: Introductionmentioning

confidence: 99%

Bubble dynamics and cavitation damage to curved elastic boundaries

Liu

Xie

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Prediction of cavitation damage to the solid boundary is crucial in the application of ultrasound. The goal of this study is to investigate the potential for a cavitation bubble to cause mechanical effects on the curved elastic boundary and contribute to the understanding of the mechanisms of bubble-structure interaction. Effects of the surface curvature of the boundary are studied using the finite volume method. In the oscillatory migration of bubbles to the bottom of the boundary, there are several shape modes at the same time. The wall stress/deformation produced by impinging jets increases with parameter α. The bubble dynamic behaviors and the wall deformation have no significant effect as Young’s modulus equals or exceeds 60 MPa. Boundary deformation generated by tensile and compressive stresses during bubble collapse may be the basic mechanism of cavitation erosion. Due to the lack of visual observation and research on the acoustic cavitation effect, the key mechanism of ultrasonic cavitation is missing. Therefore, the importance of bubble dynamics and cavitation damage in this paper is self-evident

show abstract

Bubble Dynamics-Based Modeling of the Cavitation Dynamics in Lubricated Contacts

Cited by 5 publications

References 14 publications

Effects of Rotation on Unsteady Fluid Flow and Forced Convection in the Rotating Curved Square Duct With a Small Curvature

Effects of Rotation on Unsteady Fluid Flow and Forced Convection in the Rotating Curved Square Duct With a Small Curvature

Experiments on Cavitation Control around a Cylinder Using Biomimetic Riblets

Bubble dynamics and cavitation damage to curved elastic boundaries

Contact Info

Product

Resources

About