Hi im a little confused as to what length to use as the characteristic length of the Reynolds number for a body in and incompressible flow that has no boundary conditions(ie there all open).(adsbygoogle = window.adsbygoogle || []).push({});

im going to try and draw a few examples to help me out..(i have no idea why..) from what i have read it seems to vary from person to person as to what you choose for the characteristic length but if there is some sort of convention as to choosing it could you please clarify for me?

thanks for your help in advance

---> __

---> | . |

---> | . | Length D

---> |__ |

Length L

_

/ \

\ _ / Diameter D

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Reynolds Number and its Characteristic Length?

Loading...

Similar Threads - Reynolds Number Characteristic | Date |
---|---|

B Googol and number naming scheme (Was: Just for fun) | Friday at 5:36 AM |

I Rational powers of irrational numbers | Mar 9, 2018 |

I Is this a paradox on the number line | Feb 18, 2018 |

I Question about the Divisor Function/Sums and Project Euler | Feb 16, 2018 |

A What if the (semi) field characteristic of N is not zero? | May 26, 2017 |

**Physics Forums - The Fusion of Science and Community**