Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

How to distribute the heat of reaction in a multiphase system?

How to distribute the heat of reaction in a multiphase system?

How to distribute the heat of reaction in a multiphase system?

I am trying to model the combustion of aluminum particles in air. The first step is to vaporize the particles according to the equation Δc=(3Φsρs/τ)(1+0.276∗sqrt(Re)), which describes the inter-phase mass transfer rate. Something that I am trying to understand is, whether the heat of formation of aluminum vapor should be added to added to/subtracted from the gas phase total energy, and why? Also, what about the total energy/internal energy for the particle phase? Does it not change? I am only talking about the effect of the heat of formation. I understand the changes in energy due to change in kinetic energy and Pseudo Thermal Energy.

The other question is that if I have aluminum vapor burning in oxygen that produces aluminum oxide condensate, I know the heat of reaction, but how do I distribute the energy produced due to the reaction between the gas and solid phases? What happens to the energies of the gas and solid phases? Do they reduce/increase, and how much?

In order to make the problem description more clear, I am modeling the burning of Al in air inside a closed domain. So the vaporization occurs only due to either the burning of Al or some shock passing through the domain, etc., i.e., there is no external heating.

I would really appreciate it if someone can provide me with some insight on this.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close