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| Abstract: |
| The spherical oscillation of a gas bubble in liquids is important to growth in liquids during rectified diffusions (e.g. the onset of the sonoluminescence and the enhancement of sonochemical reactions). The present paper numerically shows stability maps (divided into four zones) in which gas bubbles maintain the linearly spherical oscillation without nonlinear disturbance of rectified diffusions within a large range of bubble radius. The critical pressures of spherical and diffusional oscillations are two decisive indexes determining the stability status. Especially, the stability boundaries and influential factors (including acoustic parameters and gas concentration in liquids) are discussed and analyzed. The results show that the variations of gas concentration and acoustic parameters will dramatically change the stable status of the gas bubbles. The gas bubble could maintain the stable status when external parameters and gas concentration are set between the two critical values properly. The cases of high-frequency and low-frequency limits are also introduced at the end of the whole paper. |
| Key words: cavitation gas bubble gas concentration rectified diffusion spherical oscillation |
| DOI：10.11916/j.issn.1005-9113.18076 |
| Clc Number:CV131 |
| Fund: |
