How much less wind resistance will a round skyscraper have?

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Discussion Overview

The discussion revolves around the comparison of wind resistance between round skyscrapers and standard rectangular ones, specifically focusing on a generic elliptical shape. Participants explore the implications of shape on wind resistance, vortex shedding, and potential aerodynamic effects relevant to architectural design.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant seeks to understand the average wind resistance of a round skyscraper compared to a rectangular one for a school project.
  • Another participant highlights that vortex shedding may be a more critical issue than wind resistance itself, suggesting further reading on the Strouhal number.
  • Concerns are raised about the disadvantages of using an elliptical shape instead of a circular one, although specifics are not provided initially.
  • A participant questions whether wind direction affects the aerodynamic properties of the elliptical shape, suggesting that it might produce lift if not aligned with the symmetry axis.
  • There is a request for clarification regarding the disadvantages of elliptical shapes, indicating a lack of consensus on this point.

Areas of Agreement / Disagreement

Participants express differing views on the implications of shape on wind resistance and aerodynamic behavior, with no consensus reached on the specific disadvantages of elliptical shapes or the overall impact of wind direction.

Contextual Notes

Participants note the importance of considering wind direction and vortex shedding, but do not resolve how these factors quantitatively affect the comparison of wind resistance between the shapes discussed.

Batmoosemike
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For a school project, I need to know how much less wind resistance a round skyscraper will have compared to a standard rectangular one. You can assume the skyscraper will simply be a generic elliptical shape, somewhat similar to an egg. Answer doesn't have to be extremely specific, I just need an average to put into my presentation.

We need to make a proposal talking about the benefits of round skyscrapers vs standard, rectangular ones.

Any help would be appreciated!
 
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Batmoosemike said:
a generic elliptical shape, somewhat similar to an egg.
There is a significant disadvantage to using an elliptical shape instead of a circular one. Can you think of what that might be? It should be mentioned in your presentation... :smile:
 
berkeman said:
There is a significant disadvantage to using an elliptical shape instead of a circular one. Can you think of what that might be? It should be mentioned in your presentation... :smile:
I really can't think of what you're referring to. Could you please explain?
 
Batmoosemike said:
You can assume the skyscraper will simply be a generic elliptical shape, somewhat similar to an egg
Is the wind always coming from the same direction? Your shape might have less drag, but could produce significant lift perpendicular to the wind, if the wind is not perfectly aligned with the symmetry axis.
 
Batmoosemike said:
I really can't think of what you're referring to. Could you please explain?
See A.T.'s reply above this one, and also think about what happens at all given wind directions...
 

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