Calculating the viscosity of a 'test fluid' HELPPPPPPP

  • Thread starter Thread starter bradley123
  • Start date Start date
  • Tags Tags
    Fluid Viscosity
Click For Summary
SUMMARY

This discussion focuses on calculating the viscosity of test fluids using experimental data involving speed and force applied. The user is attempting to plot force against speed to derive viscosity through the gradient of the resulting straight line graph. The relevant formula is Stokes' Law, expressed as F = 6πμrv, where 'F' is the force, 'μ' is the viscosity, 'r' is the radius, and 'v' is the speed. The user seeks clarification on interpreting their experimental results and applying this formula effectively.

PREREQUISITES
  • Understanding of Stokes' Law and its application in fluid mechanics
  • Basic knowledge of graphing techniques and linear regression
  • Familiarity with experimental data collection and analysis
  • Ability to perform calculations involving gradients and slopes
NEXT STEPS
  • Learn how to apply Stokes' Law in practical viscosity calculations
  • Research techniques for plotting and analyzing linear graphs
  • Explore methods for calculating viscosity from experimental data
  • Investigate the impact of fluid properties on viscosity measurements
USEFUL FOR

Students and researchers in physics or engineering, laboratory technicians conducting fluid experiments, and anyone involved in fluid dynamics and viscosity measurement.

bradley123
Messages
1
Reaction score
0
Calculating the viscosity of a 'test fluid' HELPPPPPPP!

Can anyone please help me calculate the viscosity of each of the test fluids below. there are 5 of them and have each been tested 6 times. I am supposed to be doing straight line graphs and using the gradient to use to calculate the viscosity but I am having trouble big time :(

Speed ms-1 Force applied N

2 0.97 1.22 1.24 0.91 1.35 0.96
4 1.74 1.89 1.83 2.08 1.77 2.04
6 2.25 2.11 2.55 2.72 2.45 2.18
8 3.55 3.47 3.26 3.11 3.33 3.51
10 3.76 3.59 3.98 3.81 3.75 3.38
 
Physics news on Phys.org


what are these numbers suppose to mean .. please clarify ..
 


Not sure how you did your experiment but I'd assume Stokes' Law F=6πμrv, plotting F against v will give a straight line with gradient 6πμr, where 'r' is the radius.