Reynolds Number of a circular plate perpendicular to external flow

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Discussion Overview

The discussion centers on determining the Reynolds Number for a circular plate positioned perpendicular to an external flow. Participants explore the appropriate definitions and equations relevant to this scenario, considering the unique orientation of the plate in relation to the flow.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks guidance on calculating the Reynolds Number for a circular plate in a perpendicular flow context.
  • Another participant provides a link to the definition of the Reynolds Number and suggests using the diameter of the plate as the length scale.
  • A participant questions what constitutes the "length" of a flat plate when it is oriented perpendicularly to the flow.
  • A further contribution details the dimensions of the cylinder and mentions existing equations for flat plates in parallel flow, expressing difficulty in finding relevant equations for perpendicular flow.
  • The participant describes the flow setup and seeks clarification on how to apply the Reynolds Number concept to this specific configuration.

Areas of Agreement / Disagreement

Participants have not reached a consensus on how to define the length scale for the flat plate in perpendicular flow, and multiple viewpoints regarding the application of Reynolds Number in this context remain unresolved.

Contextual Notes

There is ambiguity regarding the appropriate length scale to use for the flat plate, and the discussion highlights the need for specific equations applicable to the perpendicular flow scenario, which have not been identified by participants.

bmv19
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Hello, I am trying to obtain how to find the Reynolds Number of a circular plate perpendicular to external flow. Thanks
 
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The problem is what is the "length" of a flat perpendicular plate?
 
The diameter of the cylinder is 3 inches. The length of the tube is approximately 3 feet. The set of equations that I am using say that there is an equation for a flat plate in a external perpendicular flow. I have found equations for flat plates with the external flow parallel to the plate's length as represented in the wiki-site and different school notes. However, I have yet to obtain an equation for a flat plate with a flow perpendicular to the diameter.
The problem is diagrammed below... (This flow is not a pipe. Completely filled volume)
Flow:
--> ______________ __
--> /\ ......\ |
--> | |...... | Diameter
--> \/_____________/ _|_
-->
...|-----Length----|
 

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