Fluid Mechanics Lesson 15A: One-Dimensional Compressible Flow in Ducts

Fluid Mechanics Lesson Series - Lesson 15A: One-Dimensional Compressible Flow in Ducts.

In this 15-minute video, Professor Cimbala starts with a quick review of compressible flow concepts, such as Mach number regimes. He then discusses the importance of thermodynamics for compressible flows, in particular the isentropic and adiabatic approximations. He then defines and discusses stagnation properties. Finally, he analyzes the conservation of mass equation for one-dimensional duct flow, comparing and contrasting the supersonic vs. subsonic flow behavior. He works through two example problems as well.

This video incorporates material from Sections 12-1 and 12-2 of the Fluid Mechanics textbook by Cengel and Cimbala, Edition 4.

An Excel file listing of all the videos in this series, along with the annotated notes generated during filming of the videos, can be found at


You can also watch all related short videos with one click by going to one of Dr. Cimbala's playlists:

[cosmotsd]

Thanks, it was perfect for me. I did return to compressible flows after 3 years and forgot all theese relations. Nice summary

[kaursingh]

my Lord - this is excellent lecture-- too long for me to under stand -- please make 3 short lectures - thank u my lord - amarjit - india- advocate delhi high court

[michaelgarcia]

Are you assuming the flow in the duct is uniform? In a real duct, I would expect a nonuniform flow since the velocity at the duct boundary is zero.

[spideyguy]

hi professor, i would like you to check for my workings .. i've been trying on doing some past exam papers, but i don't know whether what i do is right or wrong 🥺🥺may I pay you for tutor service :(