• Support PF! Buy your school textbooks, materials and every day products Here!

Fluid Mechanics (Gas through a pipe)

  • Thread starter Thiendrah
  • Start date
  • #1
13
0

Homework Statement


Hot CO₂ gas enters a pipe at pressure P₁ and exits at atmospheric pressure (P₂ = 1 bar) and T₂ = 0°C. The pipe has a constant diameter D = 1 cm. The input temperature is T₁ = 100°C and the mass flow rate ṁ = 0.5 g/min. There is a significant change in mechanical energy due to friction with a loss factor of 2500 m²/s².

Calculate the average flow velocities, input pressure and gas densities using the given data.


V₁ = ?
P₁ =?
T₁ = 100°C
ρ₁ =?

V₂ = ?
P₂ = 1 bar
T₂ = 0°C
ρ₂ = ?


Homework Equations


1. row2 = p2/RT2
2. V= m/(row2)A
3. Bernouliies eqn with loss.


The Attempt at a Solution


I followed those three equations. The problem begins when when V1 comes out as a new negative number. That's not possible. FYI - flow is from 1 to 2.

I'm not sure where I am missing a negative sign. I dont think it can be negative considering pressure and density values.
 

Answers and Replies

Related Threads on Fluid Mechanics (Gas through a pipe)

  • Last Post
Replies
4
Views
1K
Replies
0
Views
13K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
4
Views
1K
Replies
11
Views
736
  • Last Post
Replies
0
Views
3K
Replies
9
Views
2K
  • Last Post
Replies
2
Views
4K
Top