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## PDE Problem

Hey guys,

Now i'm trying to model the concentration in respect of time and space and that's why i'm using PDE solver. However why it does not work and it gave en error that "it found singularity while evaluating the expression.

7 REPLIES 7

## Re: PDE Problem

Hi SavitriN,

it is better to simplify everything......The following  solution isn't tested:

## Re: PDE Problem

Hi SavitriN,

the following is a revised and corrected solution.

## Re: PDE Problem

Here's my simplified solution:

Alan

## Re: PDE Problem

Thank you very much!

I will try that

## Re: PDE Problem

Thank you for the response.

Yes i will try this solution as well.

Cheers

## Re: PDE Problem

The difference between the file 1 and file 2 that you sent is in the argument you put in the PDE solver. But is that affecting the result?

Because i'm trying your second file and it seems like it does not work again

## Re: PDE Problem

Hi SavitriN,

sorry, in the solve block the derivatives must be written in the compact form: