Abstract

The influence of a magnetic field on the features of photoinduced thermocapillary deformation of the free surface of a magnetic fluid layer is considered for the first time. Deformation occurs as a result of local heating of the surface under the action of an incident laser beam and manifests itself as a curvature of the fluid surface profile. The laser beam reflected from the deformed surface exhibits a nonuniform spatial distribution of the radiation intensity in the form of concentric rings. An external magnetic field has an addition effect on the shape of the free surface of the magnetic fluid, thereby making it possible to control the photoinduced thermocapillary deformation. The geometric characteristics and time evolution of the interference pattern of the thermocapillary response are experimentally studied as depending on the strength and orientation of the magnetic field.

中文翻译：

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磁场控制的磁流体表面光致热毛细变形

摘要

首次考虑了磁场对磁性流体层自由表面的光诱导热毛细变形特征的影响。变形是在入射激光束的作用下表面局部加热的结果，并表现为流体表面轮廓的曲率。从变形的表面反射的激光束以同心环的形式显示出辐射强度的不均匀空间分布。外部磁场对磁性流体的自由表面的形状具有附加作用，从而可以控制光诱导的热毛细管变形。