Jan 5, 2005 #1 element94 Mechanical Dec 2, 2004 30 I'm looking for a table on roughness values for various materials. Specifically plastic. Thank you.
Jan 5, 2005 #2 Latexman Chemical Sep 24, 2003 6,935 Most plastics I've dealt with have been modelled as "smooth" with good success. Good luck, Latexman Upvote 0 Downvote
Jan 5, 2005 #3 briand2 Mechanical Jan 15, 2002 180 For typical pipe materials (PVC, etc), use absolute roughness ("ks") = 0.003 mm (as compared to about 0.0015 mm for copper, 0.046 mm for new black steel pipe). Regards, Brian Upvote 0 Downvote
For typical pipe materials (PVC, etc), use absolute roughness ("ks") = 0.003 mm (as compared to about 0.0015 mm for copper, 0.046 mm for new black steel pipe). Regards, Brian
Jan 5, 2005 Thread starter #4 element94 Mechanical Dec 2, 2004 30 Thanks. I was using 0.00005 ft (.0015 mm). Upvote 0 Downvote
Jan 7, 2005 #5 25362 Chemical Jan 5, 2003 4,826 I found some values by a Google search in: http://www.fluidedesign.com/download-free/pipe_rough_values.pdf Upvote 0 Downvote
I found some values by a Google search in: http://www.fluidedesign.com/download-free/pipe_rough_values.pdf
Jan 8, 2005 #6 briand2 Mechanical Jan 15, 2002 180 My figures are from the CIBSE guide (as used for pipe sizing for building services in the UK; equivalent to ASHRAE). Regards, Brian Upvote 0 Downvote
My figures are from the CIBSE guide (as used for pipe sizing for building services in the UK; equivalent to ASHRAE). Regards, Brian
Jan 12, 2005 #7 WebWizz Mechanical May 31, 2004 30 Another good link: http://engineeringpage.com/technology/pressure_drop/wall_roughness.html Also pressure drop calculations etc. Best Regards - Wim Upvote 0 Downvote
Another good link: http://engineeringpage.com/technology/pressure_drop/wall_roughness.html Also pressure drop calculations etc. Best Regards - Wim
