• ClaRa
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  • Basic Concepts of Modelling
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v1.9.0

Created Thursday 10 July 2025

This release is planned for July 2025

Overview

• The new version of ClaRa comes with a new models to simulate water-hammer in pipelines.
• SMArtIInt was updated to support Open Neural Network Exchange models (ONNX) in addition to TensorFlowLite models.
• Improved numerics, new features and bugfixes.
• The ClaRaPlus now uses the SMArtInt and no longer the SMArtIInt. Users need to search for references of SMArtIInt and replace it with SMArtInt in own models.

New Models

• PipeFlowVLE_L4_Advanced_WH_VCM: A model for fluid flow in pipe suitable to simulate water-hammer effects accounting for possible formation of vapour cavity.
• QuadraticFlatTubeFinnedNominalPoint_L4: Gas density dependent quadratic pressure drop model for a flat tube finned HX based on nominal values.
• QuadraticPlateNominalPoint_L4: VLE density dependent quadratic pressure drop model for a plate HX based on nominal values.

New Features

• Minor changes which improve usability of ClaRa and make models more robust and widen the scope of application.

Bugfixes

• Correct VLE species mass balance in VolumeVLEGas_L3.