Browsing by Author "Tsiglifis, K."
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Nonlinear oscillations and collapse of elongated bubbles subject to weak viscous effects
Tsiglifis, K.; Pelekasis, N. A. (2005)The weak viscous oscillations of a bubble are examined, in response to an elongation that perturbs the initial spherical shape at equilibrium. The flow field in the surrounding liquid is split in a rotational and an ... -
Nonlinear oscillations and collapse of elongated bubbles subject to weak viscous effects: Effect of internal overpressure
Tsiglifis, K.; Pelekasis, N. A. (2007)The details of nonlinear oscillations and collapse of elongated bubbles, subject to large internal overpressure, are studied by a boundary integral method. Weak viscous effects on the liquid side are accounted for by ... -
Nonlinear radial oscillations of encapsulated microbubbles subject to ultrasound: The effect of membrane constitutive law
Tsiglifis, K.; Pelekasis, N. A. (2008)The nonlinear radial oscillations of bubbles that are encapsulated in an elastic shell are investigated numerically subject to three different constitutive laws describing the viscoelastic properties of the shell: the ... -
Parametric stability and dynamic buckling of an encapsulated microbubble subject to acoustic disturbances
Tsiglifis, K.; Pelekasis, N. A. (2011)Stability analysis of the radial pulsations of a gas microbubble that is encapsulated by a thin viscoelastic shell and surrounded by an ideal incompressible liquid is carried out. Small axisymmetric disturbances in the ... -
Properties and solution techniques for a mixed type boundary integral equation arising in creeping flow problems
Ramachandran, A.; Tsiglifis, K.; Leal, L. G. (2012)We consider the properties of a creeping flow, boundary integral operator which is the sum of a single layer potential arising from a surface density, and two double layer potentials, one each for the tangential and normal ... -
Stability and simulations of insonated contrast agents-effect of the constitutive law
Pelekasis, N.; Efthimiu, K.; Tsiglifis, K. (2011)Under insonation contrast agents are known to exhibit dynamic patterns such as thresholding, compression only behavior, diffusion and deflation, shape deformation, buckling, jetting and break-up, not all of which can be ...