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


Residence Time Distributions

Residence Time Distributions

Residence Time Distributions


Got a quick question I was hoping that someone might be able to help me with?

I'm analysing some aging data for a R&D plug flow reactor; Its a residence time data set, based on the pulse injection method.

we're happy with the analysis of the outlet curve but due to the nature of the beast (Many methods were tried apparently...)the inlet pulse isn't ideal; Its a sharp peak but there's distinct tailing; we're assuming therefore that the tailing on the inlet pulse will add tailing to the outlet pulse...so we were wondering if there were any way(s) to factor this in to the outlet (i.e. remove / reduce its effect) trace?

The original unit from which this data was obtained has been dismantled for other R&D projects since the data was obtained a few years ago and hence the tests cant really be repeated and/or the injection method improved...

We've searched and read around the subject of RTDs in PFRs (Levenspiel et al) but cant find any method to account for the non ideal inlet pulse; any help/pointing to relevant texts etc would be most welcome!

RE: Residence Time Distributions

Is not the general way to do these things to do the convolution of the response of the system to the Dirac pulse with the actual input?
Sorry to blab in with something half remebered from school, I don't have a better answer.

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


White Paper - The Evolving Landscape of Commercial Battery-Powered Trucks
What’s driving the evolving landscape of truck electrification? What are the barriers, motivators and strategies for accelerating the electric transition? What insights and resources are available for today’s design engineers working to achieve industry disruption and evolution? For answers to these and other pertinent questions, read this white paper. Download Now
eBook - Rethink Your PLM
A lot has changed since the 90s. You don't surf the Web using dial-up anymore, so why are you still using a legacy PLM solution that's blocking your ability to innovate? To develop and launch products today, you need a flexible, cloud-based PLM, not a solution that's stuck in the past. 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