Shear elasticity of low-viscosity liquids at low frequencies

Abstract

The resonance method was applied to measure shear mechanical properties of liquids, and it has thus been established that such low-viscosity liquids as water, cyclohexane, hexadecane, and dibutyl phthalate possess a shear elasticity of about ${10}^{6}$ dyn/${\mathrm{cm}}^{2}$ at a frequency of shear oscillations of about 73.5 kHz. Now, according to the existing concepts on the nature of liquids, their shear elasticity should be observed only at a frequency of about ${10}^{11}$--${10}^{12}$ Hz. The present work maintains a comparison with the known works on measurements of the shear mechanical impedance of liquids. It has been shown that the results obtained here agree satisfactorily with measurements of the shear mechanical impedance of low-viscosity liquids at a frequency of 40 MHz.