How Does Velocity Descent Impact Spray Drying Processes?

  • Thread starter Thread starter davidgruty
  • Start date Start date
  • Tags Tags
    Spray Velocity
Click For Summary
SUMMARY

The velocity descent of fluids in spray drying processes significantly impacts heat transfer and separation efficiency. As fluid velocity increases, the heat transfer coefficient improves, which is often quantified using Reynolds, Prandtl, and Nusselt numbers. Additionally, in systems utilizing vortex separators, higher velocities enhance centrifugal force, leading to better separation of liquid droplets from gases. Specific parameters such as temperature, pressure, and mass flow rate are crucial for a comprehensive understanding of these effects.

PREREQUISITES
  • Understanding of heat transfer coefficients in fluid dynamics
  • Familiarity with Reynolds, Prandtl, and Nusselt numbers
  • Knowledge of vortex separation mechanisms
  • Basic principles of spray drying technology
NEXT STEPS
  • Research the relationship between fluid velocity and heat transfer in spray drying
  • Explore the impact of humidity on drying processes
  • Study the design and operation of vortex separators in spray drying
  • Investigate the effects of temperature and pressure on spray drying efficiency
USEFUL FOR

Engineers, process designers, and researchers involved in spray drying technology and fluid dynamics optimization.

davidgruty
Messages
20
Reaction score
0
Hello everybody, I'm new here.

I'm working with spray driers and I need to know how does the velocity descent affect to the process.

Can you help me?

I need to know how the variables affect and the consequences.

Thank you very much
 
Physics news on Phys.org
One needs to elaborate more on the process. For example, what fluid is being sprayed, and on to what is it sprayed.

In general, as the velocity of a fluid (e.g. water, air, gas, . . .) involved in forced convection increases, the heat transfer coefficient improves. Often the heat transfer coefficient is correlated with the Reynolds and Prandtl numbers, or the Nusselt number.

If it's a drying process, then humidity of a gas would be important.

If it involves a vortex separator, then the centrifugal force increases with velocity, and that would improve separation of liquid drops from a gas.

It's difficult to offer any information without more specifics, e.g. temperature, pressure, mass flow rate, phases, . . . .
 
Last edited:
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

Similar threads

  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 4 ·
Replies
4
Views
7K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 56 ·
2
Replies
56
Views
4K
  • · Replies 26 ·
Replies
26
Views
5K
  • · Replies 9 ·
Replies
9
Views
1K
  • · Replies 1 ·
Replies
1
Views
3K
Replies
2
Views
4K
Replies
18
Views
3K