Coefficent of drag(egg shaped body)

  • Context: Undergrad 
  • Thread starter Thread starter FireStorm000
  • Start date Start date
  • Tags Tags
    Body
Click For Summary
SUMMARY

The coefficient of drag (Cd) for an egg-shaped body with a flatter side leading is estimated to range between 0.5 and 2. This estimation aligns with the behavior of similar shapes, particularly spheres, where the Cd values vary based on flow speed and surface roughness. At low speeds, smoother surfaces yield lower drag, while at high speeds, irregular surfaces like dimpled golf balls can perform better. For more precise calculations, understanding the shape's elongation and comparing it to teardrop or airfoil shapes is essential.

PREREQUISITES
  • Fluid dynamics principles
  • Understanding of drag coefficients
  • Knowledge of shape aerodynamics
  • Experience with experimental fluid mechanics
NEXT STEPS
  • Research the coefficient of drag for various shapes using computational fluid dynamics (CFD) tools
  • Explore the effects of surface roughness on drag coefficients in different flow regimes
  • Study the behavior of raindrops in air and their drag coefficients
  • Investigate hypersonic flight dynamics and the shapes of fluids under extreme conditions
USEFUL FOR

Aerospace engineers, fluid dynamics researchers, and anyone involved in the study of drag coefficients and aerodynamic shapes will benefit from this discussion.

FireStorm000
Messages
168
Reaction score
0
I was wondering if anyone could ballpark a coefficient of drag for a body shaped roughly like an egg, flatter side leading? I figure it ought to be between .5 and 2, but I was hoping for something a little better than that range.
 
Physics news on Phys.org
Cd values for some simple shapes are here:
http://www.grc.nasa.gov/WWW/K-12/airplane/shaped.html

Unless it's a very elongated egg shape, it will be similar to a sphere. The wide range of Cd for a sphere depends on the flow speed and the surface roughness. For low speeds smoother gives less drag, but that is not necessarily the case at high speeds (for example, dimpled golf balls).
 
I think it would be an elongated shape. Possibly even a teardrop or airfoil shape. I'm not entirely sure on the shape.

I guess a better question to ask is how would one find the coefficient of drag for a given fluid falling in another fluid: For example, a raindrop falling in air?

How about for a raindrop in hypersonic flight? What shape would a fluid take there?
 
Last edited:

Similar threads

Undergrad Drag Coefficient of a 'flexible' object (e.g. a piece of paper)
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Relationship between Drag Force & Viscous Torque on USA Football
  • · Replies 6 ·
Replies
6
Views
1K
Graduate What is the relationship between hull shape and form drag on sailboats?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Calculate sailing ship drag, or anyway any drag of any shape
  • · Replies 17 ·
Replies
17
Views
4K
Undergrad Drag equation - relative flow velocity
  • · Replies 11 ·
Replies
11
Views
4K
Undergrad Why Does Drag Force Depend on Cone Shape and Size but Not on Mass or Gravity?
  • · Replies 5 ·
Replies
5
Views
4K
Undergrad Car Accident Physics - Are Wheels/Tires Good or Bad Energy Absorbers?
  • · Replies 1 ·
Replies
1
Views
2K
Range of Reynold's numbers (Drag Lab)
  • · Replies 9 ·
Replies
9
Views
4K
Undergrad How weather conditions affect a golf shot
  • · Replies 6 ·
Replies
6
Views
3K
Egg tossing crime -- From what location was the egg thrown?
  • · Replies 14 ·
Replies
14
Views
3K