Thermal effects on nonlinear radial oscillations of gas bubbles in liquids under acoustic excitation |
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| Affiliation: | 1. National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, China;2. State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), Nanjing University of Technology, Nanjing 210009, China;3. National Laboratory of Solid State Microstructures, Department of Materials and Science, Nanjing University, Nanjing 210093, China;1. Civil Engineering Department, The Higher Technological Institute, Ramadan 10th city, Egypt;2. Basic Sciences Department, Banha University, Shobra, Cairo, Egypt;3. Deputy Secretary General, Supreme Council of Universities, and Structural Engineering Department, Cairo University, Giza, Egypt;1. Pontifical Catholic University, Marquês de São Vicente 225, Rio de Janeiro 22451-900, Brazil;2. Federal University of Goiás, Av. Universitária 1488, Goiânia 74605-220, Brazil;1. Department of General Surgery, Shanghai Ninth People''s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China;2. Department of Pathology, Shanghai Ninth People''s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China |
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| Abstract: | Modeling of nonlinear radial oscillations of gas bubbles in liquids under acoustic excitation is an important subject for understanding of many acoustic bubble related phenomena (e.g., sonoluminescence, sonochemistry and sonoporation). In the present paper, numerical simulations of the oscillations of gas bubbles in liquids based on a more complete polytropic model are performed with heat transfer across bubble interfaces considered. By comparing with predictions given in the literature that using a constant polytropic exponent and ignoring energy dissipation through a heat transfer across bubble interfaces, our simulations reveal that the polytropic exponent and thermal dissipation mechanism significantly influence the predictions of nonlinear bubble behavior (e.g., locations and magnitudes of resonances, thresholds of subharmonics and ultraharmonics). |
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