Numerical Study on the Growth and Collapse of a Cavitation Bubble inside a Rigid Cylinder with a Compliant Coating

2014 ◽  
Vol 875-877 ◽  
pp. 1194-1198
Author(s):  
Fardin Rouzbahani ◽  
M.T. Shervani-Tabar
Keyword(s):  
Integral Equation ◽  
Boundary Integral Equation ◽  
Cavitation Bubble ◽  
Numerical Study ◽  
Finite Difference Methods ◽  
Life Time ◽  
Integral Equation Method ◽  
Boundary Integral ◽  
Compliant Coating ◽  
Rigid Cylinder

In this paper, growth and collapse of a cavitation bubble inside a rigid cylinder with a compliant coating (a model of humans vessels) is studied using Boundary Integral Equation and Finite Difference Methods. The fluid flow is treated as a potential flow and Boundary Integral Equation Method is used to solve Laplaces equation for velocity potential. The compliant coating is modeled as a membrane with a spring foundation. The effects of the parameters describing the flow and the parameters describing the compliant coating on the interaction between the fluid and the cylindrical compliant coating are shown throughout the numerical results. It is shown that by increasing the compliancy of the coating, the bubble life time is decreased and the mass per unit area has an important role in bubble behavior.

Dynamics of a Pulsating Bubble Beneath a Free Surface

2002 ◽  
Author(s):  
M. T. Shervani-Tabar
Keyword(s):  
Integral Equation ◽  
Free Surface ◽  
Boundary Integral Equation ◽  
Cavitation Bubble ◽  
Constant Pressure ◽  
Integral Equation Method ◽  
Ideal Gas ◽  
Boundary Integral ◽  
Equation Method ◽  
Bubble Collapse

In this paper Dynamics of a rebounding cavitation bubble beneath a free surface is carried out by using Boundary Integral Equation Method. The bubble contains a mixture of constant pressure vapour and ideal gas. Results show that the free surface is pushed up during the growth of the bubble and collapses with the bubble collapse. It is found that the free surface rebounds in synchronisation with the rebound of the bubble.

scholarly journals Numerical study on the impulsive growth of a gaseous plug inside a cylindrical vein with compliant coating

Bioimpacts ◽  
2017 ◽  
Vol 8 (4) ◽  
pp. 271-279
Author(s):  
Mohammad T. Shervani-Tabar ◽  
Babak Farzaneh ◽  
Reza Ahrabi ◽  
Seyed E. Razavi
Keyword(s):  
Numerical Study ◽  
Integral Equation Method ◽  
Boundary Integral ◽  
Numerical Results ◽  
Compliant Coating ◽  
Internal Wall ◽  
Maximum Volume ◽  
Bubble Generation ◽  
Rigid Cylinder ◽  
The Impact

Introduction: Employing of gaseous plugs inside a vein for preventing of blood flow to the damaged or cancerous tissues has been known as a gas embolism in the medicine. In this research, a numerical investigation has been carried out on the delivery of the liquid drug DDFP, encapsulated in the microlipid-coated spheres (MLCSs), to target the human vein for construction of the gaseous plug inside the veins. Methods: The encapsulated liquid drug DDFP were delivered to the vein by injection of an emulsion. Releasing of the liquid drug DDFP results in an explosive growth of a gaseous plug inside the vein. The targeted vein was served as a rigid cylinder with a compliant coating. The boundary integral equation method has been employed for the numerical simulation of the hydrodynamic behavior of the gaseous plug inside the vein. Results: Numerical results showed that in the case of a rigid cylinder vein with an internal compliant coating, the maximum volume of the gaseous plug was smaller than the case of just a rigid cylinder vein. Furthermore, its elapsed time from the instant of bubble generation to the instant when the bubble reaches its maximum volume was shorter. Numerical results also showed that the compliant coating on the internal wall of the rigid cylindrical vein had a tendency of reducing the impact of the explosive growth of the gaseous plug. Conclusion: This numerical research showed that the compliant coating on the internal wall of the rigid cylindrical vein had the tendency of reducing the impact of the impulsive growth of the gaseous plug. Therefore, in the case of having severed arteriosclerosis, treatment of the cancerous or damaged tissues by use of the gaseous embolism must be done very carefully in order to prevent the hazardous effects of the gaseous plug’s impulsive growth.

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