- #1
WouterWouter
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Hello,
I'm currently doing a project were I have to design a tube through which a fluid will flow at > 10 m/s. I am validating my calculations and want to use the correct roughness values. The material is a plastic deposited using rapid prototyping.
I have measured:
Ra = ~7.5 - 8
Rz = ~1.5 - 2
Clearly, using Ra or Rz gives different result. Which one should I use? Or should I use maximum roughness measures such as Rt ?
Regards,
Wouter
I'm currently doing a project were I have to design a tube through which a fluid will flow at > 10 m/s. I am validating my calculations and want to use the correct roughness values. The material is a plastic deposited using rapid prototyping.
I have measured:
Ra = ~7.5 - 8
Rz = ~1.5 - 2
Clearly, using Ra or Rz gives different result. Which one should I use? Or should I use maximum roughness measures such as Rt ?
Regards,
Wouter