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Press

Measurement of the bubble point

Improvement in the measurement of the bubble point for wire mesh using numerical models

The bubble point test is a widely used measurement method in filter media quality control. The basic principle is that pores filled with liquid only become permeable for gas from a certain pressure level upwards. This pressure level is measured and then used to deduce the pore size. The problem is that the underlying correlation between pressure and pore size is only valid for cylindrical pores. To determine the size of pores with other shapes, correction factors are applied. Up to now, these have been determined empirically or simply estimated. This paper describes a method using CFD simulations that makes it possible to determine a more accurate correction factor and thus a more precise pore size.

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