Download - Heated pipe: Difference between revisions

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== Installation ==
== Installation ==
Please download [[Media:ChuMarensiWillis25Mathematics_CORR.pdf|this paper]] on the model, and NOTE that this PDF includes a small but important correction at Figure 3.
The boundary condition for the temperature may be either fixed temperature or fixed heat-flux.


If you already have a Fortran compiler, then you only need download the current version (link below), and unpack
If you already have a Fortran compiler, then you only need download the current version (link below), and unpack
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The <tt>Makefile</tt> has been set up for <tt>gfortran</tt>, but compile flags for several compilers are included: <tt>g95, gfortran, ifort, pathf90, pgf90</tt>.   
The <tt>Makefile</tt> has been set up for <tt>gfortran</tt>, but compile flags for several compilers are included: <tt>g95, gfortran, ifort, pathf90, pgf90</tt>.   


Next see [[Getting_started]], then try the [[Tutorial]].
Use of the Heated pipe codes is essentially the same as the 'standard' (isothermal) code.  If you've not used the standard code before, see [[Getting_started]], then try the [[Tutorial]].


== Notes on the Heated pipe version ==
== Notes on the Heated pipe version ==


This code will load state files from the 'ordinary' code.  It will assume there is no perturbation to the base temperature, r^2; a turbulent flow will quickly mix this up.
This code will load state files from the 'standard' (isothermal) pipe code.  It will assume that there is no perturbation to the base temperature, r^2; a turbulent flow will quickly mix this up.


Note that the base temperature r^2 is not the laminar temperature.  To quickly compute the laminar temperature, set i_K=i_M=1, so that only the mean mode k=m=0 is simulated.  This will quickly approach the laminar flow.
Note that the base temperature r^2 is not the laminar temperature profile, and that 1-r^2 is no longer the laminar flow profile.  To compute the laminar temperature and flow profiles, set i_K=i_M=1, so that only the mean mode k=m=0 is simulated.  This will very quickly approach the laminar temperature and flow profiles.


== Citation ==
== Citation ==
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"... heated-pipe code [1] based on Openpipeflow [2]."
"... heated-pipe code [1] based on Openpipeflow [2]."


[1]: DOI: https://doi.org/10.3390/math13020293 (open access)
[1]: DOI: https://doi.org/10.3390/math13020293 (open access) [https://scholar.googleusercontent.com/scholar.bib?q=info:cMCTaKms3nwJ:scholar.google.com/&output=citation&scisdr=ClGyFW5MEO25wx3izYs:AFWwaeYAAAAAZ6Xk1YvVYp2sEuQD-ZaVHK-c4c4&scisig=AFWwaeYAAAAAZ6Xk1fMDCpw10EBJoeEXDw0Zn6o&scisf=4&ct=citation&cd=-1&hl=en bibtex]  Download [[Media:ChuMarensiWillis25Mathematics_CORR.pdf|PDF HERE]]
 
[2]: DOI: https://doi.org/10.1016/j.softx.2017.05.003 (open access)


[2]: DOI: https://doi.org/10.1016/j.softx.2017.05.003 (open access) [[:File:TheOpenpipeflowSolver.pdf|details;bibtex]]


== Current version ==
== Current version ==

Latest revision as of 13:57, 13 July 2026

Installation

Please download this paper on the model, and NOTE that this PDF includes a small but important correction at Figure 3.

The boundary condition for the temperature may be either fixed temperature or fixed heat-flux.

If you already have a Fortran compiler, then you only need download the current version (link below), and unpack 

 tar -xvvzf Openpipeflow-hp-x.xx.tgz

The Makefile has been set up for gfortran, but compile flags for several compilers are included: g95, gfortran, ifort, pathf90, pgf90.

Use of the Heated pipe codes is essentially the same as the 'standard' (isothermal) code. If you've not used the standard code before, see Getting_started, then try the Tutorial.

Notes on the Heated pipe version

This code will load state files from the 'standard' (isothermal) pipe code. It will assume that there is no perturbation to the base temperature, r^2; a turbulent flow will quickly mix this up.

Note that the base temperature r^2 is not the laminar temperature profile, and that 1-r^2 is no longer the laminar flow profile. To compute the laminar temperature and flow profiles, set i_K=i_M=1, so that only the mean mode k=m=0 is simulated. This will very quickly approach the laminar temperature and flow profiles.

Citation

Please cite something like, "... heated-pipe code [1] based on Openpipeflow [2]."

[1]: DOI: https://doi.org/10.3390/math13020293 (open access) bibtex Download PDF HERE

[2]: DOI: https://doi.org/10.1016/j.softx.2017.05.003 (open access) details;bibtex

Current version

Openpipeflow-hp-1.21:

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