Name: Hilton Moulin Caliman
Type: MSc dissertation
Publication date: 22/06/2016

Namesort descending Role
Edson Jose Soares Advisor *

Examining board:

Namesort descending Role
Bruno Venturini Loureiro Internal Examiner *
Daniel Rodríguez Álvarez External Examiner *
Edson Jose Soares Advisor *
Roney Leon Thompson Co advisor *

Summary: The liquid-liquid displacement capillary tubes are being constantly studied in the past decades. Currently, the understanding of this type of problem is of great importance, since it involves applications in oil recovery and well cementing. The phenomenon was studied in this work to clarify our understanding of the role played by physical mechanisms that govern the problem, as a reason of viscosities, number of capillary, due to special masses, Reynolds number and the non-Newtonian properties of the material. In a simple experimental apparatus a viscoplastic material solution is used to displace a Newtonian liquid into a capillary tube. The images are captured of the interfaces during the test. From the images we get the shape of the interfaces and the thickness of fluid displaced which remains adhered to the tube wall as a function of the parameters. Through a simple volume balance it is also possible to measure the recovery efficiency. In this work it is shown that recovery efficiency and the thickness of the liquid film that remains adhered to the wall are not directly related. Also, instabilities have been identified along the length of the bubbles from the central region to end. Finally, it was also observed that the recovery efficiency of viscoplastic case was higher than the equivalent Newtonian case, while the thickness of the liquid film that remains adhered to the tube wall was smallest.

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