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!
  • Students Click Here

*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


Mathematical Modeling - Adsorption Column using Duhamel Theorem

Mathematical Modeling - Adsorption Column using Duhamel Theorem

Mathematical Modeling - Adsorption Column using Duhamel Theorem

Hi all!

I´m trying to understand all the equations of the article in attachment and have many difficulties. Can someone help me to deduce the equation 4 and how I use de Duhamel Theorem to go to the equation 6 for the equation 24?

Thanks for any help here!!!

RE: Mathematical Modeling - Adsorption Column using Duhamel Theorem

The author is going from a solution for a step (Heaviside) change in concentration, to a solution where the concentration evolves over time,

you'll notice the time derivative of u bar in (24)

this is equivalent to converting the step reponse to the "impulse response" to a Dirac delta function.

a commonly used approach,

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!


White Paper: Rapid Manufacturing with FDM
The automotive industry is increasingly turning to additive manufacturing, and fused deposition modeling (FDM) specifically, as a reliable alternative to traditional metal-cutting methods, like milling, turning and boring. Download Now
White Paper: Revolution in Design
Open up new possibilities for your business by changing the way you think about product development. Compared to traditional methods, 3D printing offers advantages that allow you to make more innovative products and get them to market faster. Download Now

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