Proffesor why the wetting phase goes to the small pores first , i know Wettability impose this , but why wettability didn’t imbibe the wetting phase into the big pore first ,still there is rock and IFT
This is because imbibition into small pores happens at a higher capillary pressure - it is more energetically favourable for the wetting phase to reside close to the solid. The non-wetting phase preferentially minimizes its contact with the solid by residing in the larger pores.
Is it valid to say that if the adhesive force greater than the cohesive force (wetting phase), the fluid tends to maximize its surface area to volume ratio, achievable within small pores? Conversely, if the adhesive force is weaker than the cohesive force (nonwetting phase), the fluid tends to minimize its surface area to volume ratio, achievable within larger pores and by adopting a spherical shape?
