Interfacial Tension

EXPERIMENT 03

INTERFACIAL TENSION

PTRE 361-01

PETROLEUM ENGINEERING LABORATORY I

Instructor: Dr. Mehdi Ostadhassan, Mr. Junior Nasah

Mr. Alexander Monk, and Mr. Mehdi Mofidian

Author Name:

Partner Name(s):

Experiment Contacted on: 02/28/2016

Report Submitted on: 02/29/2016

College of Engineering and Mines

TABLE OF CONTENT

Objectives ……………………………………………………………..1

Introduction…………………………………………………………….1

Equipment and components used ………………………………………1

Experimental Method and Procedure……………………………………2

OBSERVATIONS, DATA, FINDINGS AND RESULTS……………..2

Error Analysis…………………………………………………………3

Problems/ Questions……………………………………………………3

Recommendations and conclusions…………………………………….4

Objective:

To measure surface tension using both, the DuNouy ring and the capillary tube methods.

Introduction:

In a fluid system, the presence of two or more phases may be observed because of interfaces between the components. This happens only if the fluids are immiscible (oil/water, water/air, oil/gas). The figure below is a sketch of forces occurring in an air/liquid system. The figure shows molecules of a fluid, which are bonded together by electro-chemical forces. Molecules far from the interface are equally affected in every direction by the same type of molecules resulting in zero net force acting upon those molecules. However, molecules close to the surface are surrounded by different types of molecules resulting in an unbalanced net force normal to the surface

EQUIPMENTS AND COMPONENTS USED

* Water

* Oil

* Beaker

* Paper clip

* DuNouy Ring

* DuNouy Ring Tensiometer

This method uses an iridium wire through which a force is applied to the fluid/fluid interface. The force is applied to the interface creating a new fluid surface till it snaps. The tension given by the apparatus is the interfacial tension of the system.

[1]

DuNuoy Ring Method and Procedure

1. Clean the platinum-iridium ring by rinsing it with...