Two-Phase Flow

The Most Comprehensive Two-Phase Thermohydraulic Analyzer Available

CRTech's fluid modeling module was designed right from the start to handle the peculiarities of two-phase flows along with the complexities of transitioning between single-phase and two-phase. In fact, its development was initiated specifically to avoid the shortcomings of single-phase analyzers that had been retrofitted to adapt to two-phase problems.

Combined with the heat transfer capabilities that CRTech's software provides and the CAD-based interface of FloCAD® (a module of Thermal Desktop®), and the unique capabilities such as parametric analyses, optimization, calibration, and statistical design, CRTech's two-phase flow software is truly in a class by itself.

Download the Two-Phase Brochure

Recorded Videos

Two-Phase Flow CapabilitiesDepliction of Flow Regime Mapping and Slip Flow

  • Complete thermodynamics: phases appear and disappear as conditions warrant
  • Two-phase heat transfer correlations built-in or user-defined
  • Built-in options to support pool boiling and quasi-stagnant convection
  • Two-phase pressure drop correlations built-in or user-defined
  • Automatic flow regime mapping
  • From quasi-steady homogeneous equilibrium to fully transient two-fluid modeling
  • Optional slip flow modeling (separate phasic momentum equations)
  • Optional nonequilibrium transients
    • Complete separation of phases
    • Separate phasic energy and mass equations
  • Metastable throat states in orifices and cavitating venturis
  • Flat-front modeling methods (minimal mixing of phases) for purging, priming
  • Capillary modeling tools for static or vaporizing wicks
  • Tracking of liquid surfaces in complex tanks and vessels

Two-Phase Mixture Capabilities

  • Mixtures of up to 26 liquids and/or gases
  • Optional condensible/volatile component in mixture, including effects such as diffusion-limited condensation
  • Optional dissolution of any number of gaseous solutes into any number of liquid solvents, including homogeneous nucleation modelsCondensing in the Presence of Noncondensible Gas

Sample Industries

  • Automotive (climate control, transmissions, fuel/air)
  • Electronics (liquid cooling including immersion cooling, condensation on surfaces)
  • Aerospace (thermal management, cryogenics, propulsion, ECLSS)
  • Aircraft (air conditioning, fuel/air including flow within multiple fuel tank bays)
  • Energy Systems (BWR, Rankine cycle power plants)
  • Petrochemical and Pharmaceutical (gas transport, steam injection, two-phase processes)

Sample Applications

  • Condenser, evaporator, and boiler sizing and simulation
  • Vapor compression and Rankine cycle analyses, including dynamic responses
  • Throttling processes, including Joule-Thomson cooling with two-phase outlets
  • Loop heat pipe (LHP) and capillary pumped loop (CPL) design and simulation
  • Two-phase thermosyphon simulation, whether loops or counterflow
  • Integrated analysis of cryogenic systems and dewars, thermodynamic vents and vapor-cooled shields, anti-geyser lines, pressurant systems, thermally stratified tanks, and turbomachinery cool-down
  • Gas storage and distribution systems including the effects of condensation
  • Fuel/air systems, including partially filled complex vessels
  • Waterhammer and other fast transient effects including flashing, column separation, chugging and other oscillations in two-phase lines
  • Pressurized fire retardant delivery systems
  • Condensing air heat exchangers and wet air psychrometrics, including condensation on electronics
  • Fuel cells and support equipment

 

Simulating Tanks and Vessels (click to register)

Tuesday October 22, 9am MT (8am PT, 11am ET)

This webinar explains options for modeling partially-full tanks, cryostats, and other vessels using TD/FloCAD. Topics include phasic nonequilibrium ("twinned tanks"), initializing two-phase mixtures, Ports, and Compartments, HTP (enclosure) ties for heat transfer, and thermally-stratified tanks.

Prerequisite: Introduction to Two-phase Flow webinar

 

Pipeline Simulation Options (click to register)

Thursday October 24, 9am MT (8am PT, 11am ET)

This webinar covers options for modeling pipelines using FloCAD Pipes. Topics include the various Pipe form options including choices for walls and heat transfer, customization and initialization, Ports with Pipes, and various options for dealing with horizontal and vertical two-phase flows including chilldown and purging.

Prerequisite: Introduction to Two-phase Flow webinar