Dimensionless Radius: What is the Range?

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Dimensionless radius is defined as the ratio of a specific radius to a reference value, which may not necessarily be the maximum radius. The expected range for dimensionless radius is typically between 0 and 1; however, the graph in question shows a range of 0 to 3. This discrepancy suggests that the reference value used in the graph is not the maximum radius but rather a typical radius. Understanding the choice of reference value is crucial for interpreting the graph accurately. The discussion highlights the importance of clarifying reference values when analyzing dimensionless quantities.
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Dear all

Please find the attached picture. I have a question on Dimensionless radius.
I believe that it is a ratio of radius and maximum radius . The range should be 0-1 . But in the attachment I found that in the x-axis the range is 0- 3 . Can you please explain how?

Thank you
 

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It is the radius divided by some reference value. That can be the maximal radius, but it does not have to be. Apparently, in this graph it is not the maximal radius, it looks more like a typical radius.
 
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