Experimental device and experimental method for measuring viscosity coefficient of liquid

Abstract

The invention discloses an experimental device for measuring the viscosity coefficient of liquid and an experimental method thereof. The experimental device comprises a laser, a water tank, a transducer, an observation screen, a stable mechanical vibration source, a meter ruler and a protractor. A simple experimental device is utilized, and an obvious diffraction pattern can be obtained as long as stable light waves and water waves can be provided under the condition of a laboratory; the diffraction characteristic of the wave is fully utilized to realize the research on the water wave, and then the viscosity coefficient of the water is obtained through the decline of the water wave; the device is ingenious in design, vibration of the vibrating membrane on the surface of the loudspeaker drives the pin to vibrate, so that the water surface is driven to form concentric circle type water waves around the pin, stable water waves can be generated as long as audio signals are controlled to be stable, clear and stable diffraction patterns can be generated, and the device is simple and clear in structure, clear in gradation and exquisite in function design; the phenomenon is obvious, and tiny water waves difficult to measure are displayed through diffraction images convenient to observe and measure through the diffraction effect of the laser and the water waves.

Description

technical field [0001] The invention relates to an experimental device, in particular to an experimental device for measuring the viscosity coefficient of a liquid and an experimental method thereof. Background technique [0002] The viscosity coefficient of a liquid is also called the coefficient of internal friction or viscosity. It is an important physical quantity to describe the internal friction properties of liquids. It characterizes the ability of a liquid to resist deformation, and it is only manifested when there is relative motion in the liquid. Liquid viscosity coefficient is an important parameter to characterize the ability of liquid to resist deformation, and has important applications in production, life, engineering technology and medicine. There are many methods for measuring the viscosity coefficient, such as falling ball method, capillary method, rotating drum method, etc. Among them, the falling ball method is the most basic method, and the method of m...

AI Technical Summary

Problems solved by technology

There are many methods for measuring the viscosity coefficient, such as falling ball method, capillary method, rotating drum method, etc. Among them, the falling ball method is the most basic method, and the method of measuring the viscosity coefficient of a liquid by the falling ball method is only suitable for measuring the viscosity coefficient. Transparent or translucent liquids, such as castor oil, glycerin, etc., but there are many disadvantages in the viscosity coefficient experiment of the falling ball method, such as the release of small balls depends on experience, and the timing error of artificial stopwatch is large, etc.

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