Supported fluid material properties

Fluid material properties listed in the following table are supported by the flow and thermal solvers in the Simcenter 3D Multiphysics, Thermal/Flow, Space Systems Thermal, and Electronic Systems Cooling solver environments except if noted differently.

Material Property	SI Units	Variable With	Notes
Mass Density	kg/m³	FrequencyTemperatureTemperature and pressure	RequiredMass density varies with frequency only for Simcenter 3D Acoustics BEM analyses.
Thermal Conductivity	W/m-K	TemperatureTemperature and pressure	Required
Thermal Expansion Coefficient	1/K	Temperature	Ignored for duct modelingRequired for 3D buoyancy modeling when the following conditions are met:The buoyancy model is Boussinesq.You do not use the ideal gas law.Variable for a 3D liquid only
Dynamic Viscosity	N-sec/m²	TemperatureTemperature and pressure	Required
Specific Heat at Constant Pressure	J/kg-K	TemperatureTemperature and pressure	Required
Gas Constant	J/kg-K	N/A	Ignored for duct modelingRequired for 3D gasMust be null for a 3D liquidNot applicable to Simcenter 3D Space Systems Thermal analyses
Speed of sound	m/sec	Frequency	Only applicable to Simcenter Nastran and Simcenter 3D Acoustics BEM solutionsSpeed of sound varies with frequency only for Simcenter 3D Acoustics BEM analyses.

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Fluid materials for acoustic analyses

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Supported fluid material properties, Simcenter 3D 2021.1 Series

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