This temperature is taken as the cloud point. viscosity we can see that a rapid change in viscosity occurs at 35.4˚C. However, a rapid change in viscosity occurs at the cloud point and this change can be measured with the SV-10A.įrom this graph of temperature vs. This is called the cloud point and traditionally could only be measured optically. Surfactants become cloudy when they reach a certain temperature. This is the result of a measurement taken while a 1% concentration of a non-ionic surfactant was heated. There is a clear difference in solidification temperature which is dependent on the concentrations of the aqueous gelatin solutions.Ĭloud point measurement Example) Non-ionic surfactant The horizontal axis shows temperature and the vertical axis shows a logarithm of the viscosity of the aqueous gelatin solutions. This example shows viscosity measurement of 2.5% and 5% aqueous gelatin solutions over varying temperature.
Gel transition / hydrogel measurement Example) Aqueous gelatin solution
#Viscosity windows series#
The SV-10/SV-10A series of tuning fork vibro viscometers are capable of continuous measurement over a range of viscosities from the extremely low (0.3 mPa Standard Cup Set for SV-10A/100A (AX-SV-54)Įxample Measurements with the Tuning Fork Vibro Viscometer (SV/SV-A Series) Simplified calibration function (for SV-1A and SV-10A)Ĭlick here to see the complete accessory list.
#Viscosity windows windows#
Windows Communication Tools WinCT-Viscosity and a serial-USB converter provided as standardĮxcellent repeatability (1% of the measured value by standard deviation)Įxtremely high sensitivity (detects a viscosity as low as 0.3 mPa Simultaneous measurements of temperature and viscosity
Wide-range, continuous measurement without replacing the sensor plates X-Y-Z stage for fine position adjustment of the sample cup All rights reserved.Anti-corrosive, titanium sensor plates and temperature sensor In addition, we have found periodic windows interspersed with chaotic regions indicating the presence of transient chaos, which is important from application point of view if predictability is required.īifurcation structure Bubble dynamics Chaos Continuation technique High viscosity Keller–Miksis equation.Ĭopyright © 2015 Elsevier B.V. We report evidence that below a threshold temperature the bubble model, the Keller-Miksis equation, becomes an overdamped oscillator suppressing collapse-like behaviour. By applying the sophisticated numerical techniques of modern bifurcation theory, the present study intends to reveal the regions in the excitation pressure amplitude-ambient temperature parameter plane where collapse-like motion of an acoustically driven gas bubble in highly viscous glycerine exists. The fundamental physical basis of these applications is the prevailing extreme conditions (high temperature, pressure and even shock waves) during the collapse of acoustically excited bubbles. In the last decade many industrial applications have emerged based on the rapidly developing ultrasonic technology such as ultrasonic pasteurization, alteration of the viscosity of food systems, and mixing immiscible liquids.
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