# 1-D Hydraulic with Thermal Analysis

**URL:** <https://calculix.discourse.group/t/1-d-hydraulic-with-thermal-analysis/2032>\
**Category:** Uncategorized\
**Created:** [January 20, 2024, 10:26pm UTC](https://calculix.discourse.group/t/1-d-hydraulic-with-thermal-analysis/2032 "2024-01-20T22:26:23Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![cmmcnamara](https://avatars.discourse-cdn.com/v4/letter/c/ed655f/32.png) [@cmmcnamara](https://calculix.discourse.group/u/cmmcnamara)\
**Post date:** [January 20, 2024, 10:26pm UTC](https://calculix.discourse.group/t/1-d-hydraulic-with-thermal-analysis/2032/1 "2024-01-20T22:26:23Z")

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Hello,

I have used Calculix in the form of a solver using MECWAY and with PrePoMax and have been exploring some of its other capability recently. To be honest I am still learning how to format the input cards/deck and am not very good at it yet, so this question may be simple and a misunderstanding on my part.

I saw that the solver has the capability to solve fluid networks utilizing pipes, etc but its not clear to me if it is able to do this on a transient basis and with thermal mass involved as it appears to only be resistive network analysis. Can anyone shed light if it is possible to perform both simultanously via a COUPLED anaylsis?

For reference, in professional life I use SINDA/FLUINT/Thermal Desktop daily which does RC type fluid thermal network analyses and I am interested if Calculix can do the same at home.

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**Author:** ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)\
**Post date:** [January 20, 2024, 11:33pm UTC](https://calculix.discourse.group/t/1-d-hydraulic-with-thermal-analysis/2032/2 "2024-01-20T23:33:53Z")

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Yes, it should be possible since fluid network elements support thermal effects. But they are limited to stationary flows. Check the CalculiX User’s Manual chapters _6.2.37. Three node network element (D)_ and _6.9.17. Hydraulic Networks_.

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**Author:** ![cmmcnamara](https://avatars.discourse-cdn.com/v4/letter/c/ed655f/32.png) [@cmmcnamara](https://calculix.discourse.group/u/cmmcnamara)\
**Post date:** [January 23, 2024, 5:52am UTC](https://calculix.discourse.group/t/1-d-hydraulic-with-thermal-analysis/2032/3 "2024-01-23T05:52:02Z")

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Thanks, I will take a look at those sections.

I assume by stationary you mean that transient solutions are not possible then?

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<div class="post-metadata">

**Author:** ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)\
**Post date:** [January 23, 2024, 8:00am UTC](https://calculix.discourse.group/t/1-d-hydraulic-with-thermal-analysis/2032/4 "2024-01-23T08:00:49Z")

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Yes, steady-state flows only. It’s explained (along with equations) in chapter 6.9.17.