Wetting Fluid Selection

For a successful CFP measurement, the wetting fluid must fill all pores and remain in those pores until expelled by the applied pressure.

 

A low surface tension and low viscosity ensure complete wetting. A low vapor pressure ensures the fluid will not evaporate, including when exposed to high flow rates for several minutes.

 

GALWIK

• The most popular choice for general applications

• Low surface tension ensures complete wetting

• Low vapor pressure, so observed pore opening is caused by test pressure, not flow-driven evaporation

 

POREWIK

• Low surface tension ensures complete wetting 

• Higher vapor pressure, so it evaporates more quickly than GalWik

• May be helpful in cases where dry curves are compromised by re-wetting

 

The system includes default values for the surface tension of each type of wetting fluid. To optimize pore diameter accuracy, enter the individually measured value for the batch of fluid you are using.

 

Other fluids can be created by the operator with input of the correct Surface Tension.