Electrostrictive fluid pressure from a laser beam
Physics of Fluids, ISSN: 1070-6631, Vol: 23, Issue: 9
2011
- 24Citations
- 26Captures
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Article Description
Recent times have seen a surge of research activity on systems combining fluid mechanics and electromagnetic fields. In radiation optics, whenever information about the distribution of pressure in a dielectric fluid is required, the contribution from electrostriction becomes important. In the present paper, we calculate how the local pressure varies with position and time when a laser beam is imposed in a uniform fluid. A Gaussian intensity profile of arbitrary time dependence is assumed for the beam, and general results are derived in this case. For demonstration, we analyze two different cases: first, that the beam is imposed suddenly (mathematically in the form of a step function) and second, that the beam is switched on in a soft way. In both cases, simple analytical expressions for the pressure distribution are found. © 2011 American Institute of Physics.
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