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ptc-57002361-Visitor
1-Visitor
April 20, 2014
Solved

Help with PDEsolve!

  • April 20, 2014
  • 1 reply
  • 3658 views

I've been working on this file for a couple days now, but I'm not getting it to solve. I removed the reaction rate terms (R__) just to test and see if my mass balances were correct, by inputing dummy values for the R's. The balances were calculated correctly this way. SO, my problem lies in how I'm integrating my R terms into my balances, but I can't figure out what I'm doing wrong. I'm not a professional with mathcad, so it may even be a small error. Any help would great!

Best answer by AlanStevens

The attached might help.

Alan

1 reply

V
ValeryOchkov24-Ruby IV
24-Ruby IV
April 20, 2014

Can you show us the description of this problrm?

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ptc-57002361-VisitorAuthor
1-Visitor
April 20, 2014

I'm modeling a selective catalytic reactor, in which nitrogen monoxide(NO) is being removed from flue gas by reacting with ammonia(NH3). I'm supposed to build a dynamic model that accounts for diffusion and other types of transport through the reactor. What I have on that mathcad file is my approach to solving for the mole fractions of each component throughout the length of the reactor(L) varying with time(t).

V
ValeryOchkov24-Ruby IV
24-Ruby IV
April 20, 2014

We (Vikror Korobov and me) have in our book

Chemical Kinetics with Mathcad and Maple

same problems

See the list of problems with Web- and Worksheet in Mathcad -

http://twt.mpei.ac.ru/TTHB/New-Chem-Kin/En-ChemKin.html

But we have only ODEs but would like to have PDEs too in the second edition of the book.

Let do it togwrger.

Now about your sheet.

You have equations after the word Given

A good trick - input = on one equation/ You must have the answer - zero (not equal), but you have

PDE-Chem.png

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