Viscosity of oil at various temperatures

  • Thread starter Thread starter nvidia17
  • Start date Start date
  • Tags Tags
    Oil Viscosity
Click For Summary
SUMMARY

The discussion centers on calculating the viscosity of oil at various temperatures, specifically addressing an erroneous result of -1330245.26. The user utilized the density of a steel ball bearing at 7545.4 kg/m³ and oil at 168.8 kg/m³, with a velocity of 0.44 m/s and a radius of 0.0061 m. The issue was identified as a mistake in the formula used in Excel, where the radius was incorrectly input in millimeters instead of meters, leading to incorrect viscosity calculations.

PREREQUISITES
  • Understanding of fluid dynamics principles
  • Familiarity with viscosity calculations
  • Proficiency in using Excel for scientific calculations
  • Knowledge of unit conversions, particularly between millimeters and meters
NEXT STEPS
  • Research the relationship between temperature and viscosity in fluids
  • Learn about the Reynolds number and its significance in fluid dynamics
  • Explore advanced Excel functions for scientific data analysis
  • Study the impact of density on viscosity calculations
USEFUL FOR

This discussion is beneficial for students in physics or engineering courses, particularly those working on fluid dynamics projects, as well as anyone involved in practical applications of viscosity measurements.

nvidia17
Messages
8
Reaction score
0
I'm trying to work out the viscosity of oil at various temperatures. I've got all my results, but when I try to work out the viscosity I get some really far out answers. What region would you expect the viscosity of oil room temperature to be? I get this result for viscosity of oil: -1330245.26.

This is the formula I'm using.
viscosity.jpg


I've found the density of the steel ball bearing to be 7545.4kg/m3 and the density of oil to be 168.8kg/m3.

I know the working out of the velocity is correct, at 0.44m/s¹

The radius of the ball bearing is 0.0061m
What looks out of place here?

This is my A2 coursework, so tips or help would be appreciated. :shy:
 
Physics news on Phys.org
Okay, I'm sorry for this, but it turns out I made an error in my formula's Excel. I double checked them with a calculator and realized that I hadn't put the radius in metres, but mm.

Sorry for the inconvenience. :-p
 

Similar threads

Viscosity & Temperature - Linearisation and glycerine?
  • · Replies 10 ·
Replies
10
Views
6K
Viscosity and temperature, density is changing....
  • · Replies 29 ·
Replies
29
Views
5K
Find the viscosity coeffienct of glycerol, using stokes law
  • · Replies 12 ·
Replies
12
Views
34K
Calculating viscosity of a liquid with a falling object
  • · Replies 4 ·
Replies
4
Views
2K
Coursework help - Stokes Law equation + graphs
  • · Replies 3 ·
Replies
3
Views
5K
Sanity check on falling steel ball in water
  • · Replies 5 ·
Replies
5
Views
2K
Calculating Density and Viscosity of Oil Using Ball Drop Experiment
  • · Replies 7 ·
Replies
7
Views
2K
How do I calculate the pH of slime and its effect on viscosity?
  • · Replies 2 ·
Replies
2
Views
3K
Crude Oil Flow Rate Calculation: Viscosity & Reynolds Eq.
  • · Replies 5 ·
Replies
5
Views
4K
Auto/Motor Where to best increase car engine oil pressure if intervention is needed?
  • · Replies 11 ·
Replies
11
Views
5K