Re: Accelarate Calculation For Pellets
No doubt there are more precise methods, though Navier Stokes?
Regards,
Lyle ■
Re: Accelarate Calculation For Pellets
Dear shenjie,
The acceleration can be calculated with:
Force = mass * acceleration
Or
Acceleration = Force / Particle mass
Force = * dragfactor * airdensity * vrelative^2 * Particlearea - graviatational component - boyancy component
Particle area = pi/4 * d^2
Particle mass = pi/6 * d^3 * particle density
As the particle accelerates, the vrelative decreases and so does the acceleration.
The particle reaches a quasi stationary particle velocity when the acceleration force equals the deceleration forces.
As the conveying air expands along the trajectory, the quasi stationary particle velocity increases along the pipeline.
This is the basic principle of pneumatic conveying.
Have a nice day
Teus ■
Teus
Re: Accelarate Calculation For Pellets
Originally Posted by Teus Tuinenburg
The acceleration can be calculated with:
Force = mass * acceleration
Or
Acceleration = Force / Particle mass
Force = * dragfactor * airdensity * vrelative^2 * Particlearea - graviatational component - boyancy component
Particle area = pi/4 * d^2
Particle mass = pi/6 * d^3 * particle density
As the particle accelerates, the vrelative decreases and so does the acceleration.
The particle reaches a quasi stationary particle velocity when the acceleration force equals the deceleration forces.
As the conveying air expands along the trajectory, the quasi stationary particle velocity increases along the pipeline.
This is the basic principle of pneumatic conveying.
Have a nice day
Teus
Gragfactor? how to workout it? ■
Shenjie Tel:+86(0)20 83553890,83550361 Fax: +86(0)20 83542314 [email]sj@chinabulk.com[/email] [url=http://www.chinabulk.com]Sino-Auto Technology[/url]
Re: Accelarate Calculation For Pellets
Originally Posted by Teus TuinenburgThe acceleration can be calculated with:
Force = mass * acceleration
Or
Acceleration = Force / Particle mass
Force = * dragfactor * airdensity * vrelative^2 * Particlearea - graviatational component - boyancy component
Particle area = pi/4 * d^2
Particle mass = pi/6 * d^3 * particle density
As the particle accelerates, the vrelative decreases and so does the acceleration.
The particle reaches a quasi stationary particle velocity when the acceleration force equals the deceleration forces.
As the conveying air expands along the trajectory, the quasi stationary particle velocity increases along the pipeline.
This is the basic principle of pneumatic conveying.
Have a nice day
Teus
Get it! very useful! thanks! ■
Shenjie Tel:+86(0)20 83553890,83550361 Fax: +86(0)20 83542314 [email]sj@chinabulk.com[/email] [url=http://www.chinabulk.com]Sino-Auto Technology[/url]
Accelarate Calculation for Pellets
I need to analysis the moving motion of a globle shape pellet in air flow.
I have the following data:
real density of the pellet: D
diameter of the pellet: d
shape: ball with a surface roughness: 0.1mm, material: like plastic.
Wind velosity: V, vertical upward.
Is there a function to calculat the force by the wind on that pellet? ■
Shenjie Tel:+86(0)20 83553890,83550361 Fax: +86(0)20 83542314 [email]sj@chinabulk.com[/email] [url=http://www.chinabulk.com]Sino-Auto Technology[/url]