Admissible Roughness vs Hydraulically Smooth -- CFD Online Discussion Forums

February 28, 2016, 06:59	Admissible Roughness vs Hydraulically Smooth	#1
kennedy1992 New Member Kennard Junitra Join Date: Sep 2015 Posts: 6 Rep Power: 10	Hi all, I have a question regarding the difference between a rough wall with roughness within the admissible roughness value, and a rough wall being hydraulically smooth. Is there any difference between the two? In my understanding of the two concept, I have the understanding that there is no effect on the fluid flow characteristics, or change in skin friction in both cases. Your help is truly appreciated

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