Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
General Engineering
Mechanical Engineering
Electrical Engineering
Aerospace Engineering
Nuclear Engineering
Materials Engineering
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
General Engineering
Mechanical Engineering
Electrical Engineering
Aerospace Engineering
Nuclear Engineering
Materials Engineering
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Engineering
Mechanical Engineering
The Venturi Effect cannot explain how an eductor works
Reply to thread
Message
[QUOTE="nohappy, post: 6308025, member: 674566"] [B]TL;DR Summary:[/B] Bernoulli principle is only describing a fluid along a streamline while eductor's suction effect involves ambient air I've google all the keywords like "eductor", "ejector", "Venturi pump". All of them are the mechanism or applications that utilize "Venturi Effect". All of them are trying to explain the "suction effect" by saying that restriction area makes the fluid's velocity higher and hence lower pressure which is the definition of Venturi Effect. So far, I can comprehend that. That can be explained by Bernoulli's principle as well. However, it is the following statement that confuses me for couple of weeks - "..., and the lower pressure generate a kind of vacuum thus suck the ambient fluid or air in." First of all, the definition of Bernoulli's principle only describes a single fluid along a streamline. I get that the fluid will have higher speed and lower pressure at the restriction area than the other point on its own path. But how can you prove that the "lower pressure point on its path" is lower than ambient pressure so that it can suck fluid or air from outside? And even if you can prove that effect by physics, how is that related to Venturi Effect or Bernoulli's principle if you're discussing two different fluid? [ATTACH type="full" alt="1583724582295.png"]258379[/ATTACH] Secondly, if the suction is created by low pressure result from high speed, why do I need to create a restriction area that generates Venturi Effect? Why not just generate high speed air at the first place? In other words, I guess you can also make a eductor with a straight pipe? Again, if that assumption is correct, how is an eductor/ejector related to Venturi Effect? [/QUOTE]
Insert quotes…
Post reply
Forums
Engineering
Mechanical Engineering
The Venturi Effect cannot explain how an eductor works
Back
Top