-
Recent Posts
Recent Comments
- Samuelfiest on Installing yarnpkg on Debian 11 (bullseye)
- lasix no prescription on Installing yarnpkg on Debian 11 (bullseye)
- silagra without a prescription on Installing yarnpkg on Debian 11 (bullseye)
- ashwagandha where to buy on Installing yarnpkg on Debian 11 (bullseye)
- where to buy colchicine on Installing yarnpkg on Debian 11 (bullseye)
Archives
- December 2020
- June 2019
- February 2019
- July 2017
- May 2017
- December 2016
- October 2016
- September 2016
- August 2016
- June 2016
- May 2016
- April 2016
- March 2016
- February 2016
- November 2015
- September 2015
- August 2015
- March 2015
- December 2014
- September 2014
- July 2014
- June 2014
- February 2014
- November 2013
- September 2013
- August 2013
- April 2013
- March 2013
- January 2013
- December 2012
- August 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- August 2011
- July 2011
- June 2011
- May 2011
- February 2011
- January 2011
- December 2010
- November 2010
- October 2010
- September 2010
- August 2010
- June 2010
Categories
Meta
Category Archives: Chemeng
Automatic generation of C++ code for process models – 3 of 3
Here we are at the last installment of this series of posts on automatic code generation, which started out as a journey to make the workflow for coding process models in C++ with the LIBPF™ library easier and less boring. … Continue reading
Posted in C++, Chemeng, Howtos
Leave a comment
Automatic generation of C++ code for process models – 2 of 3
In this part two of the series of three posts we will leverage the techniques discussed in part one (command-line C++ code generation from the JSON representation of process models with the jinja2 template engine) to make the code generation … Continue reading
Automatic generation of C++ code for process models – 1 of 3
Coding process models in C++ with the help of LIBPF is easy (try one of our tutorials !), but it’s fair to say that it’s somewhat boring and error prone. For example if you add an integer parameter to your … Continue reading
The RRSB particle size distribution
In the concrete and coal processing industries the RRSB (Rosin, Rammler, Sperling und Bennett) equation for interpolating PSD (Particle Size Distribution) curves is quite popular. The RRSB distribution is: D=1-exp(-(d/d’)^n) and has this appearance: The name RRSB is used in … Continue reading
Posted in Chemeng, Uncategorized
1 Comment
Sieve tray flooding correlation
The correlation of Fair, J. R., “How to Predict Sieve Tray Entrainment and Flooding” Petro/chem. Engr., 33 (10), pp. 45–62 (1961) also cited in Perry, Chemical Engineers Handbook 7th ed. page 14-27 can be used to predict the flooding limit … Continue reading
Posted in Chemeng
Leave a comment
The open area for triangular pitch perforated sheets
For heat exchanger tube plates and for sieve trays in columns, the triangular pitch arrangement is common. You can find ready-to-use formulas on the web to calculate the open area of a perforated sheets, such as this one on the … Continue reading
Posted in Chemeng, Uncategorized
Leave a comment
Is open source an option for process simulation software ?
This is an updated version of the forum entry titled “Is open source appropriate at all for chemeng software ?” which was posted here 5 years ago; that forum seems abandoned nowadays, but the topic is still relevant so I … Continue reading
Posted in Chemeng, Philosophy, Uncategorized
Leave a comment
Innovation in numerical analysis
Innovation does not stop in the field of numerical analysis, which lies at the heart of industrial applications of numerical simulation and modeling. In this regards the recent paper “Multifrontal Factorization of Sparse SPD Matrices on GPUs (ACM)” by T … Continue reading
Posted in Chemeng, Philosophy, Rants, Uncategorized
Leave a comment
Heat transfer in falling-film boiling
The correlation of Kunz and Yerazunis (H. R. Kunz and S. Yerazunis, An Analysis of Film Condensation, Film Evaporation, and Single-Phase Heat Transfer for Liquid Prandtl Numbers From 0.001 to 10000, J. Heat Transfer / Volume 91 / Issue 3, … Continue reading
Posted in Chemeng, Howtos
4 Comments
A robust expression for the Log Mean Temperature Difference (LMTD)
The Log Mean Temperature Difference (LMTD) is a deceivingly simple expression to compute the average driving force in heat transfer: LMTD = (ΔT1 – ΔT2) / log(ΔT1 / ΔT2); The ΔT1 and ΔT2 are the temperature approaches, as in this … Continue reading
Posted in C++, Chemeng
Leave a comment