Integrate pipe pressure loss and heat transfer correlations

[modelica-trac-importer]

Reported by kproelss on 28 Mar 2010 19:46 UTC
Pressure drop and heat transfer correlations for turbulent and laminar pipe flow are added to Modelica.Fluid in MSL 3.2 with the new package Dissipation. In order to make them available as choices in the pipe models already existing in Modelica.Fluid several changes have to be made to these models. The main challenges are:

• Current correlations combine pressure changes due to friction and to static head, while the dissipation correlations only cover friction losses.
• All pressure drop or heat transfer choices require the same variable input (replaceable functions) or a common set of variable modifications (replaceable models).
• All pressure drop or heat transfer choices require the same parameter input (replaceable functions) or parameter modifications are applied to the redeclared model (and disappear if another choice is made)
• How can non-matching choice combinations be avoided, e.g. a two-phase pressure drop correlation and one-phase medium package?
• Robustness at flow reversal
• Redundant correlation choices must be avoided, while still maintaining backwards compatibility or at least conversion to equivalent physical behavior.

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Migrated-From: https://trac.modelica.org/Modelica/ticket/344

[modelica-trac-importer]

Modified by fcasella on 14 Dec 2015 22:42 UTC

[modelica-trac-importer]

Changelog removed by fcasella on 14 Dec 2015 22:42 UTC