Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Displacement of Viscous Liquids by a Newtonian Material on Capillary Tubes
Submission Author:
Hilton Moulin Caliman , ES
Co-Authors:
Alan Victor Ferreira Modolo, Edson Soares, Roney Thompson
Presenter: Alan Victor Ferreira Modolo
doi://10.26678/ABCM.ENCIT2016.CIT2016-0382
Abstract
The liquid-liquid displacement in capillary tubes has been constantly analyzed on the last decades. Currently, the comprehension of this kind of problem is of great relevance, as it involves several applications on oil recovery and on cementing of oil wells. The phenomenon has been explored at the present work in order to enlighten our understanding of the role played by the physical mechanisms that governs the problem. In a simple experimental apparatus, a PEG solution is used to displace a Newtonian liquid in a capillary tube. The images of the interface are recorded during the test. From these images, we have the interface shape and the thickness of the displaced liquid attached to the wall as a function of the capillary number and viscosity ratio. By a simple volume balance, we also have a measure of the displacement efficiency. It is shown that the physical mechanism is governed by the viscosity and density ratios, capillary number, Reynolds number. Finally, it is noticed that when viscosity ratio decreases, the thickness of the displaced liquid attached to the wall increases while the fraction of mass that is not recovered decreases.
Keywords
liquid-liquid displacement, capillary tube, displacement efficiency
