D Expt 1 Determination of Reynolds Numb

XAVIER UNIVERSITY – ATENEO DE CAGAYAN
COLLEGE OF ENGINEERING

ACTIVITY NO. 3
DETERMINATION OF REYNOLDS NUMBER

Date Performed: December 09, 2014

ChE 34 A: UNIT OPERATIONS LAB

Submitted by:
Ephrem John O. Agorob

201030788

Jill Carlotha P. Cajote

201030149

Jacqueline Faye D. Lim

201030739

Melody Kimberly D. Pitoc

201014465

Instructor:
Engr. Edwin Richard R. Ortiz

Date Submitted: December 16, 2014

1

REYNOLDS NUMBER

Experiment 3

ABSTRACT: The experiment focuses on types of flow of liquids. It aims to classify if the flow of is either laminar or turbulent. Reynolds number is a dimensionless quantity that gives the ratio of kinetic or inertial forces to viscous force in the fluid condition. The bigger the Reynolds number the more orderly is the flow of the fluid molecules. The experiment uses a small stream entering dye with flowing water to observe its behavior through the glass pipe. The observation of the dye behavior will be supported by the Reynolds number calculation. The manipulated parameter is the opening of the outflow valve, having an opening of 1 revolution, 2 revolutions, 4 revolutions and6 revolutions (maximum opening)and computed Reynolds number of 3823.79, 11659.14, 14733.30 and 21185.65 respectively. Based from the results, as the opening of the outflow valve increases the velocity of water increases with its volumetric flow rate and Reynolds number. Theoretically, the obtained trend is correct because velocity is directly proportional to Reynolds number.

KEYWORDS: Reynolds number, laminar, turbulent
INTRODUCTION:

The type of flow occurring in a channel is important in fluid dynamics situational problems.
When fluids move through a closed channel of any cross section, the flow may become laminar or turbulent. Generally, when the velocity of flow is slow, the patterns are smooth. However, when the velocity is quite high, an unstable pattern is observed (Geankoplis, 2003). In determining whether the flow of fluid in the pipe will become laminar or turbulent, Reynolds number(

Cited: Geankoplis, C. J. (2003). Principles of Transport Processes and Separation Processes, 4th Falkovich, G. (2011). Fluid Mechanics. Cambridge University Press.(retrieved on December 12, 2014) Singh, S. (retrieved on December 12, 2014).