matlab - Latest Commentshttp://matlab-cheme-cmu.disqus.com/enWed, 12 Feb 2020 11:13:48 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/11/17/modeling-a-transient-plug-flow-reactor/#comment-4793406419<p>What can we do for two reversible reactions with two reactants and two products in this case?</p>Min WUWed, 12 Feb 2020 11:13:48 -0000Re: Matlab in Chemical Engineering at CMU http://matlab.cheme.cmu.edu/2011/12/25/gibbs-energy-minimization-and-the-nist-webbook/#comment-4791616613<p>Thank you very much for sharing this. It is very useful for me.</p>NiknkkTue, 11 Feb 2020 02:49:19 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/11/17/modeling-a-transient-plug-flow-reactor/#comment-4772257016<p>Thanks for your help. By the way this is the system I want to solve. <a href="https://uploads.disquscdn.com/images/43c63dfa96baa09accaf6ac1aac680915bc663f9b368b3e13735518729bab5bf.png" rel="nofollow noopener" title="https://uploads.disquscdn.com/images/43c63dfa96baa09accaf6ac1aac680915bc663f9b368b3e13735518729bab5bf.png">https://uploads.disquscdn.c...</a> ,</p>Franklin GarciaSun, 26 Jan 2020 17:24:57 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/11/17/modeling-a-transient-plug-flow-reactor/#comment-4771656578<p>you are probably trying to solve a system of ODES. You might look at this example <a href="http://matlab.cheme.cmu.edu/2011/08/07/first-order-reversible-reaction-in-batch-reactor//" rel="nofollow noopener" title="http://matlab.cheme.cmu.edu/2011/08/07/first-order-reversible-reaction-in-batch-reactor//">http://matlab.cheme.cmu.edu...</a> for some guidance.</p>JohnKitchinSun, 26 Jan 2020 07:34:12 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/11/17/modeling-a-transient-plug-flow-reactor/#comment-4771246967<p>Hello, I am currently working in modelling a PFR in a water treatment plant for an university project and I am working with to substances substrate and biomass, so I need to solve two differential equations. I was using your program but I do not know how can I implement it to solve the second differential equation. Do you know if it is possible to do. thanks</p>Franklin GarciaSat, 25 Jan 2020 22:51:46 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/08/27/introduction-to-statistical-data-analysis/#comment-4759600775<p>This is great, thank you!</p>Genevieve GoebelThu, 16 Jan 2020 13:06:02 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/09/11/the-equal-area-method-for-the-van-der-waals-equation/#comment-4707573509<p>You save my life, I am eternally grateful.</p>KuanSat, 30 Nov 2019 13:37:23 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/11/17/modeling-a-transient-plug-flow-reactor/#comment-4369779266<p>You need to add "global V k vo" to the main and the function for the code to run and produce the graph presented</p>Jose TaboraFri, 08 Mar 2019 11:43:26 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2012/08/31/what_do_you_want-m/#comment-4227996235<p>@JohnKitchin Dear sir,<br>I have some doubts on modelling of mass transport in tubular membrane (hollow fiber membrane) using matlab.<br>how to convert partial differential equation to ODE <br>and i have inflow values only how to make boundary condition on membrane liquid surface (since it is laminar flow, radial diffusion take place while flow is in axial direction )</p>ThineshThu, 06 Dec 2018 09:56:54 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2012/05/08/enhancements-to-matlab-wordpress-2/#comment-4163308918<p>This is great info ! Thanks</p>Joe ClarkeFri, 26 Oct 2018 03:06:44 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/10/31/matlab-meets-the-steam-tables/#comment-4122746522<p>Thanks for sharing.</p>JohnKitchinSun, 30 Sep 2018 20:14:45 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/10/31/matlab-meets-the-steam-tables/#comment-4111698008<p>Just tried, this is the same<br><a href="https://in.mathworks.com/matlabcentral/fileexchange/9817-x-steam-thermodynamic-properties-of-water-and-steam" rel="nofollow noopener" title="https://in.mathworks.com/matlabcentral/fileexchange/9817-x-steam-thermodynamic-properties-of-water-and-steam">https://in.mathworks.com/ma...</a></p>Ephraim RajMon, 24 Sep 2018 11:44:54 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/10/31/matlab-meets-the-steam-tables/#comment-4111697713<p><a href="https://in.mathworks.com/matlabcentral/fileexchange/9817-x-steam-thermodynamic-properties-of-water-and-steam" rel="nofollow noopener" title="https://in.mathworks.com/matlabcentral/fileexchange/9817-x-steam-thermodynamic-properties-of-water-and-steam">https://in.mathworks.com/ma...</a><br>This works</p>Ephraim RajMon, 24 Sep 2018 11:44:47 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/10/31/matlab-meets-the-steam-tables/#comment-4000254733<p>It may be gone forever. I do not know if there is an updated link.</p>JohnKitchinSat, 21 Jul 2018 18:56:11 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/10/31/matlab-meets-the-steam-tables/#comment-3998557129<p>hello <br>i couldn't find the file i guess the link doesn't work please could you put a direct link which allowed me to download it</p>legend of koooraFri, 20 Jul 2018 14:23:57 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/11/17/modeling-a-transient-plug-flow-reactor/#comment-3939670552<p>i want it please if you have it, fiigyandoh@gmail.com</p>Edmund Sam-GyandohMon, 11 Jun 2018 11:41:46 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2012/06/19/colors-3d-plotting-and-data-manipulation/#comment-3851674445<p>It is a nonlinear regression, so you have to give the algorithm an initial guess to start it.</p>JohnKitchinThu, 12 Apr 2018 09:21:46 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2012/06/19/colors-3d-plotting-and-data-manipulation/#comment-3851601846<p>Hi, <br>what does " guesses=[20, 40, 20];" means in the codes for fitting the data? <br>Thank you</p>林瑞容Thu, 12 Apr 2018 08:28:57 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/11/17/modeling-a-transient-plug-flow-reactor/#comment-3810595710<p>I also want it please if you have it send it to me <br>noor_aljmmal_1986@hotmail.com</p>Noor AljammalSat, 17 Mar 2018 11:09:09 -0000Re: Matlab in Chemical Engineering at CMU http://matlab.cheme.cmu.edu/2011/12/25/finding-equilibrium-composition-by-direct-minimization-of-gibbs-free-energy-on-mole-numbers/#comment-3798907794<p>I got the result, I am trying to do it for bio-mass and air plus water is it possible... <br>like CH1.72O0.65+0.15H20+0.6502.. Need to change the equivalence ratio and moisture content</p>ಮನು ಭಕ್ತMon, 12 Mar 2018 08:40:53 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/09/02/stopping-the-integration-of-an-ode-at-some-condition/#comment-3723170742<p>True, that should work. Thank you. If value is a vector, apparently if one of the events is triggered (ie if one of the components become 0), the integration is terminated.</p><p>Another problem i faced was that, because numerical integration is carried out, the 'time' when concentration exactly becomes 0, was skipped depending on time step.. so the event was not triggered and i ended up getting negative values for concentration. (This was finally resolved by checking for a sign change instead of checking if the value is zero... just sharing.. ^-^ )</p>batmanTue, 23 Jan 2018 20:50:05 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/09/02/stopping-the-integration-of-an-ode-at-some-condition/#comment-3722999163<p>If you want all components of the vector to be zero, why not just take the norm of your vector (which is a scalar), and define *that* to be 'value'?</p>Daniel WalshTue, 23 Jan 2018 18:37:48 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/11/17/modeling-a-transient-plug-flow-reactor/#comment-3613820710<p>can u send me if u received it?</p>Shaan AhamedMon, 13 Nov 2017 10:11:13 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/08/27/introduction-to-statistical-data-analysis/#comment-3515716703<p>You're right. I double checked and tinv() returns one sided values with no option to return two sided values. This makes no sense and the fact that they don't even mention it in their documentation is pretty poor form. So, you're right, if you want the most common interpretation of 95% CI you have to do the calculations to convert 95% two-sided into 97.5% one-sided for the right value.</p>Emiliano JordanWed, 13 Sep 2017 12:49:44 -0000Re:
Matlab in Chemical Engineering at CMU
http://matlab.cheme.cmu.edu/2011/08/27/introduction-to-statistical-data-analysis/#comment-3513711168<p>I don't have access to Matlab any more, so i am not totally sure. I think what I did is correct though, because it should be a symmetric distribution, i.e. 0.025 on each side of the distribution, which adds up to a 95% confidence interval.</p>JohnKitchinTue, 12 Sep 2017 09:09:58 -0000