Pressure force on a control volume

  • Thread starter princejan7
  • Start date
  • #1
93
0

Homework Statement


http://postimg.org/image/4a8sv6umh/

Why do the pressure forces due to p1 and p2 act in the same direction?

Homework Equations




The Attempt at a Solution


I thought that, given the direction of the flow, the pressure force on the bottom and top would act in opposite directions
 

Answers and Replies

  • #2
20,451
4,357
The region outside the control volume exerts a pressure force on the region inside the control volume at two locations. The pressure at the top is pushing the fluid into the control volume. The pressure at the bottom is trying to keep the fluid from coming out of the control volume. Both these pressures act in the same direction (from outside the control volume to inside the control volume).

Chet
 

Related Threads on Pressure force on a control volume

  • Last Post
Replies
1
Views
2K
Replies
3
Views
9K
  • Last Post
Replies
8
Views
548
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
1
Views
14K
  • Last Post
Replies
4
Views
4K
  • Last Post
Replies
13
Views
602
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
5
Views
547
Replies
2
Views
965
Top