How Do You Calculate the Flow Rate of Air Through the Trachea?

[Nellen2222]

Homework Statement

Reynolds number and the turbulence of trachael air flow

under the conditions of normal activity an adult inhales about 1.1l of air during each inhalation. using a stop watch, dTErmine the time for one of your own inhalations and hence estimate the volume flow in m^3/s through your trachea during inhalation. The diameter of the trachea is appx 25mm.

Homework Equations

The Attempt at a Solution

I converted 25mm to m = 0.025m
1.1l = 0.001 meters^3
I just can't seem to get the right "inahlation using a stopwatch". I used 0.3m^3/s but that didnt seem to be right at all. Can anyone help me? What is a reasonable vallue for this??

 

[Redbelly98]

... using a stop watch, dTErmine the time for one of your own inhalations ...

I just can't seem to get the right "inahlation using a stopwatch". I used 0.3m^3/s but that didnt seem to be right at all. Can anyone help me? What is a reasonable vallue for this??

What did you get for your inhalation time? If you don't have an actual stopwatch, a clock or watch that displays the seconds (in addition to hours and minutes), or one that has a seconds hand, would work.

 

[Nellen2222]

2.5 seconds per inahalation

 

[Chestermiller]

2.5 seconds per inahalation

If each inhalation contains 1.1 liters (1100cc) and requires 2.5 seconds, what is your inhalation rate in lites/sec (or cubic meters per second or cc/sec)?

 

[Redbelly98]

2.5 seconds per inahalation

Okay, that sounds totally reasonable. Now you just need to follow Chestermiller's line of questions. You have the amount of air in liters, and the amount of time in seconds. So next you need to calculate the rate in liters/second.