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Design of a capacitance sensor for void fraction measurement using QuickField

Void fraction measurement

In two phase flows the void fraction is essential for describing the flow pattern transition, quantifying the pressure drop and the heat transfer, as well as calculating other important parameters such as the density or viscosity of the two-phase. Whereas several possible measurement techniques are available in order to measure the void fraction, the capacitive measurement technique is widely preferred because it has numerous advantages. However, even in the case of a simple capacitance void fraction sensor, a proper design of the sensor is required. Moreover, due to a non linear dependence between the measured capacitance and the corresponding void fraction a calibration of the sensor is essential.
In this webinar it is shown that QuickField can be used to optimize the capacitance sensor in terms of sensitivity. Furthermore, during this webinar it is also demonstrated how to apply QuickField for the simulation of the sensor's calibration curve.

Read presentation (in PDF format).

Simulation examples (including MATLAB files):
Design sensor
Bubbly flow pattern
Annular flow pattern

View movie Download the video recording.

Watch online on YouTube.