Kurz, Thomas

[["dc.bibliographiccitation.artnumber","106501"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Reports on Progress in Physics"],["dc.bibliographiccitation.volume","73"],["dc.contributor.author","Lauterborn, Werner"],["dc.contributor.author","Kurz, Thomas"],["dc.date.accessioned","2018-11-07T08:38:57Z"],["dc.date.available","2018-11-07T08:38:57Z"],["dc.date.issued","2010"],["dc.description.abstract","Bubbles in liquids, soft and squeezy objects made of gas and vapour, yet so strong as to destroy any material and so mysterious as at times turning into tiny light bulbs, are the topic of the present report. Bubbles respond to pressure forces and reveal their full potential when periodically driven by sound waves. The basic equations for nonlinear bubble oscillation in sound fields are given, together with a survey of typical solutions. A bubble in a liquid can be considered as a representative example from nonlinear dynamical systems theory with its resonances, multiple attractors with their basins, bifurcations to chaos and not yet fully describable behaviour due to infinite complexity. Three stability conditions are treated for stable trapping of bubbles in standing sound fields: positional, spherical and diffusional stability. Chemical reactions may become important in that respect, when reacting gases fill the bubble, but the chemistry of bubbles is just touched upon and is beyond the scope of the present report. Bubble collapse, the runaway shrinking of a bubble, is presented in its current state of knowledge. Pressures and temperatures that are reached at this occasion are discussed, as well as the light emission in the form of short flashes. Aspherical bubble collapse, as for instance enforced by boundaries nearby, mitigates most of the phenomena encountered in spherical collapse, but introduces a new effect: jet formation, the self-piercing of a bubble with a high velocity liquid jet. Examples of this phenomenon are given from light induced bubbles. Two oscillating bubbles attract or repel each other, depending on their oscillations and their distance. Upon approaching, attraction may change to repulsion and vice versa. When being close, they also shoot self-piercing jets at each other. Systems of bubbles are treated as they appear after shock wave passage through a liquid and with their branched filaments that they attain in standing sound fields. The N-bubble problem is formulated in the spirit of the n-body problem of astrophysics, but with more complicated interaction forces. Simulations are compared with three-dimensional bubble dynamics obtained by stereoscopic high speed digital videography."],["dc.identifier.doi","10.1088/0034-4885/73/10/106501"],["dc.identifier.isi","000282093900003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18876"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Iop Publishing Ltd"],["dc.relation.issn","1361-6633"],["dc.relation.issn","0034-4885"],["dc.title","Physics of bubble oscillations"],["dc.type","review"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2916"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Physics of Fluids"],["dc.bibliographiccitation.lastpage","2922"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Wolfrum, B."],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Mettin, Robert"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T10:35:58Z"],["dc.date.available","2018-11-07T10:35:58Z"],["dc.date.issued","2003"],["dc.description.abstract","In the present study we experimentally investigate bubble dynamics after laser induced shock wave exposure in the vicinity of salt crystals suspended in water. High-speed microscopic images show aspherical collapse and rebound of single and multiple bubbles with initial radii between 5 and 150 mum. Radius time curves of bubbles close to one boundary are compared to the bubble dynamics of a spherical model. The bubble dynamics strongly depends on the position of neighboring bubbles and on the number of boundaries given by the surrounding salt grains. After excitation bubbles are drawn to the closest particles in their vicinity. Subsequent application of shock waves leads to jet formation against the rigid boundaries. The bubbles often tend to form in or migrate into cracks on the crystal surfaces and sometimes lead to the breakage of particles due to rapid bubble dynamics. Similar behavior may occur in other cases where material damage is induced by shock waves in liquids such as lithotripsy or shock wave cleaning applications. (C) 2003 American Institute of Physics."],["dc.identifier.doi","10.1063/1.1608938"],["dc.identifier.isi","000185268200013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45216"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.relation.issn","1070-6631"],["dc.title","Shock wave induced interaction of microbubbles and boundaries"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","PII S0894-1777(02)00182-6"],["dc.bibliographiccitation.firstpage","731"],["dc.bibliographiccitation.issue","6-7"],["dc.bibliographiccitation.journal","Experimental Thermal and Fluid Science"],["dc.bibliographiccitation.lastpage","737"],["dc.bibliographiccitation.volume","26"],["dc.contributor.author","Akhatov, I."],["dc.contributor.author","Vakhitova, N."],["dc.contributor.author","Topolnikov, A."],["dc.contributor.author","Zakirov, K."],["dc.contributor.author","Wolfrum, B."],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Lindau, O."],["dc.contributor.author","Mettin, Robert"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T10:14:38Z"],["dc.date.available","2018-11-07T10:14:38Z"],["dc.date.issued","2002"],["dc.description.abstract","Single cavitation bubble luminescence induced by laser in contrast to single bubble sonoluminescence has no need in a sound field for a strong collapse and for light emission, The cavitation bubbles are produced by focused laser light and make the single strong collapse. As shown experimentally. the number of emitted photons from cavitatior luminescence is much greater than it was observed in sonoluminescence due to the large bubble size during the final stage of co lapse. To describe the process of laser-induced bubble collapse a mathematical model is used, which is based upon the spherically symmetric motion including compressibility, heat and mass transfer effects. The basic results of the numerical solution are presented for the bubbles with maximum radii of about I mm. According to the observed results the minimum bubble radius in collapse is about 15 mum, and the mass decreases up to 5% of the initial value. Calculations with a small amounts or noncondensable gas inside the bubble predict its strong influence on the dynamics. As shown numerically the theoretical model gives a good agreement with experimental measurements. (C) 2002 Elsevier Science Inc. All rights reserved."],["dc.identifier.doi","10.1016/S0894-1777(02)00182-6"],["dc.identifier.isi","000178284700017"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40657"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Inc"],["dc.publisher.place","New york"],["dc.relation.conference","4th International Congress on Multiphase Flow"],["dc.relation.eventlocation","TULANE UNIV, NEW ORLEANS, LA"],["dc.relation.issn","0894-1777"],["dc.title","Dynamics of laser-induced cavitation bubbles"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","484"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Ultrasonics Sonochemistry"],["dc.bibliographiccitation.lastpage","491"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Lauterborn, Werner"],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Geisler, Reinhard"],["dc.contributor.author","Schanz, Daniel"],["dc.contributor.author","Lindau, O."],["dc.date.accessioned","2018-11-07T11:03:58Z"],["dc.date.available","2018-11-07T11:03:58Z"],["dc.date.issued","2007"],["dc.description.abstract","Basic facts on the dynamics of bubbles in water are presented. Measurements on the free and forced radial oscillations of single spherical bubbles and their acoustic (shock waves) and optic (luminescence) emissions are given in photographic series and diagrams. Bubble cloud patterns and their dynamics and light emission in standing acoustic fields are discussed. (c) 2006 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.ultsonch.2006.09.017"],["dc.identifier.isi","000245565900012"],["dc.identifier.pmid","17254826"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/51731"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.publisher.place","Amsterdam"],["dc.relation.conference","10th Meeting of the European-Society-of-Sonochemistry"],["dc.relation.eventlocation","Hamburg, GERMANY"],["dc.relation.issn","1350-4177"],["dc.title","Acoustic cavitation, bubble dynamics and sonoluminescence"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","066307"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW E"],["dc.bibliographiccitation.volume","74"],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Kroeninger, Dennis"],["dc.contributor.author","Geisler, Reinhard"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T08:55:40Z"],["dc.date.available","2018-11-07T08:55:40Z"],["dc.date.issued","2006"],["dc.description.abstract","Cavitation bubbles are generated in water by low-energy femtosecond laser pulses in the presence of an ultrasonic field. Bubble dynamics and cavitation luminescence are investigated by CCD photography and photomultiplier measurements in dependence on the phase of the acoustic cycle at which the bubbles are generated. The experimental results demonstrate that the initially small laser-generated bubbles can be expanded significantly by the sound field and that weak cavitation luminescence can be observed in two small intervals of the seeding phase. The luminescence yield sensitively depends on the degree of sphericity of bubble collapse."],["dc.identifier.doi","10.1103/PhysRevE.74.066307"],["dc.identifier.isi","000243165900039"],["dc.identifier.pmid","17280148"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22958"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","American Physical Soc"],["dc.relation.issn","1539-3755"],["dc.title","Optic cavitation in an ultrasonic field"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","042406"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW E"],["dc.bibliographiccitation.volume","88"],["dc.contributor.author","Ishiyama, Tatsuya"],["dc.contributor.author","Fujikawa, Shigeo"],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T09:18:37Z"],["dc.date.available","2018-11-07T09:18:37Z"],["dc.date.issued","2013"],["dc.description.abstract","A boundary condition for the Boltzmann equation (kinetic boundary condition, KBC) at the vapor-liquid interface of argon is constructed with the help of molecular dynamics (MD) simulations. The KBC is examined at a constant liquid temperature of 85 K in a wide range of nonequilibrium states of vapor. The present investigation is an extension of a previous one by Ishiyama, Yano, and Fujikawa [Phys. Rev. Lett. 95, 084504 (2005)] and provides a more complete form of the KBC. The present KBC includes a thermal accommodation coefficient in addition to evaporation and condensation coefficients, and these coefficients are determined in MD simulations uniquely. The thermal accommodation coefficient shows an anisotropic behavior at the interface for molecular velocities normal versus tangential to the interface. It is also found that the evaporation and condensation coefficients are almost constant in a fairly wide range of nonequilibrium states. The thermal accommodation coefficient of the normal velocity component is almost unity, while that of the tangential component shows a decreasing function of the density of vapor incident on the interface, indicating that the tangential velocity distribution of molecules leaving the interface into the vapor phase may deviate from the tangential parts of the Maxwell velocity distribution at the liquid temperature. A mechanism for the deviation of the KBC from the isotropic Maxwell KBC at the liquid temperature is discussed in terms of anisotropic energy relaxation at the interface. The liquid-temperature dependence of the present KBC is also discussed."],["dc.identifier.doi","10.1103/PhysRevE.88.042406"],["dc.identifier.isi","000326048400002"],["dc.identifier.pmid","24229188"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28444"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1550-2376"],["dc.relation.issn","1539-3755"],["dc.title","Nonequilibrium kinetic boundary condition at the vapor-liquid interface of argon"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","435"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","EUROPHYSICS LETTERS"],["dc.bibliographiccitation.lastpage","440"],["dc.bibliographiccitation.volume","66"],["dc.contributor.author","Geisler, Reinhard"],["dc.contributor.author","Schmidt-Ott, W. D."],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T10:49:15Z"],["dc.date.available","2018-11-07T10:49:15Z"],["dc.date.issued","2004"],["dc.description.abstract","Laser-induced cavitation bubbles in heavy water are investigated at different parameter settings. Neutrons are searched for in close temporal proximity to cavitation luminescence flashes with an estimated detection efficiency of 4%. No neutrons in coincidence with cavitation luminescence have been detected. This yields an upper limit of emitted neutrons per bubble collapse of 5 x 10(-4)."],["dc.identifier.doi","10.1209/epl/i2003-10214-0"],["dc.identifier.isi","000223064700021"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/48382"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Edp Sciences S A"],["dc.relation.issn","0295-5075"],["dc.title","Search for neutron emission in laser-induced cavitation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3370"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","The Journal of the Acoustical Society of America"],["dc.bibliographiccitation.lastpage","3378"],["dc.bibliographiccitation.volume","130"],["dc.contributor.author","Koch, P."],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Parlitz, Ulrich"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T08:50:06Z"],["dc.date.available","2018-11-07T08:50:06Z"],["dc.date.issued","2011"],["dc.description.abstract","Bubble dynamics is investigated numerically with special emphasis on the static pressure and the positional stability of the bubble in a standing sound field. The bubble habitat, made up of not dissolving, positionally and spherically stable bubbles, is calculated in the parameter space of the bubble radius at rest and sound pressure amplitude for different sound field frequencies, static pressures, and gas concentrations of the liquid. The bubble habitat grows with static pressure and shrinks with sound field frequency. The range of diffusionally stable bubble oscillations, found at positive slopes of the habitat-diffusion border, can be increased substantially with static pressure. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3626159]"],["dc.identifier.doi","10.1121/1.3626159"],["dc.identifier.isi","000297486600020"],["dc.identifier.pmid","22088010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21618"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Acoustical Soc Amer Amer Inst Physics"],["dc.relation.issn","0001-4966"],["dc.title","Bubble dynamics in a standing sound field: The bubble habitat"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5060"],["dc.bibliographiccitation.issue","26"],["dc.bibliographiccitation.journal","Applied Physics Letters"],["dc.bibliographiccitation.lastpage","5062"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Wolfrum, B."],["dc.contributor.author","Mettin, Robert"],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T09:41:29Z"],["dc.date.available","2018-11-07T09:41:29Z"],["dc.date.issued","2002"],["dc.description.abstract","Levovist contrast agent bubble dynamics after spark-induced pressure wave exposure is investigated in the vicinity of normal rat kidney fibroblast cells. The bubble dynamics is calculated using the Keller-Miksis model and results are compared with the experimental radius time curves. High-speed microscopic images show rapid bubble expansion and collapse. Even at moderate peak negative pressure amplitudes of less than 2 MPa the contrast agent bubbles have been observed to expand to more than 30 times their original radius and to rupture cells upon collapse. (C) 2002 American Institute of Physics."],["dc.identifier.doi","10.1063/1.1531225"],["dc.identifier.isi","000180018300056"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33743"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.relation.issn","0003-6951"],["dc.title","Observations of pressure-wave-excited contrast agent bubbles in the vicinity of cells"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","046306"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW E"],["dc.bibliographiccitation.volume","64"],["dc.contributor.author","Wolfrum, B."],["dc.contributor.author","Kurz, Thomas"],["dc.contributor.author","Lindau, O."],["dc.contributor.author","Lauterborn, Werner"],["dc.date.accessioned","2018-11-07T08:37:14Z"],["dc.date.available","2018-11-07T08:37:14Z"],["dc.date.issued","2001"],["dc.description.abstract","The light emission of transient laser-produced cavitation bubbles in water is investigated in a range of ambient pressures up to 5 bar and laser energies up to 30 mJ. At elevated pressures bubble luminescence can be increased more than two fold for bubbles created with the same laser energy, and up to almost an order of magnitude comparing bubbles of the same maximum radius. Both the conversion of large laser energies into mechanical energy of the bubble, and the conversion of mechanical energy into light are improved at higher pressure."],["dc.identifier.doi","10.1103/PhysRevE.64.046306"],["dc.identifier.isi","000171649100073"],["dc.identifier.pmid","11690145"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18485"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","American Physical Soc"],["dc.relation.issn","1063-651X"],["dc.title","Luminescence of transient bubbles at elevated ambient pressures"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]