Official Flownex SE Distributor in Ukraine — CADFEM Ukraine
Flownex SE —
thermal-hydraulic system
simulation software
Flownex SE is the leading 1D thermal-hydraulic network simulator for power plants, oil & gas pipelines, nuclear circuits, rocket propulsion systems, and HVAC. Entire fluid systems — thousands of components — solved in seconds. Official licensing and English-speaking support available in Ukraine through CADFEM Ukraine.
1D system simulation: entire pipeline networks solved in seconds, not hours
Water hammer analysis (MOC) — industry standard for transient pipeline hydraulics
IAPWS-IF97 steam, real gases, two-phase, refrigerants, cryogenic fluids
Nuclear industry modules: PWR/BWR circuit, ECCS, LOCA transient simulation
English-speaking engineering team — CADFEM Ukraine, official Flownex distributor
1D
system-level thermal-hydraulic simulation — entire plant or pipeline network in one model, solved in seconds
30+
industries: power generation, nuclear, oil & gas, aerospace, rocket propulsion, HVAC, refrigeration
10+
years CADFEM Ukraine — official Flownex SE distributor and ANSYS Channel Partner in Ukraine
Key Use Cases
What is Flownex SE
The system simulator for thermal-hydraulic engineering
Flownex SE is a 1D thermal-hydraulic network simulation platform developed by m-tech (South Africa) and part of the ANSYS partner ecosystem. It models entire fluid systems — steam power plant cycles, gas pipeline networks, nuclear cooling circuits, rocket propellant feed systems — as networks of interconnected 1D elements solved simultaneously in a single model.
Unlike 3D CFD (ANSYS Fluent), Flownex SE gives system engineers the answer they actually need in design: which pump to select, what the system operating point is, how the system responds to a trip or shutdown, and what happens to pressure in the piping network when a valve closes too fast. CADFEM Ukraine is the official Flownex SE distributor in Ukraine providing licenses, English-language training, and thermal-hydraulic consulting.
1D network simulation — thousands of components in seconds
Flownex SE models entire thermal-hydraulic systems as networks of 1D elements — pipes, pumps, compressors, heat exchangers, valves, vessels. Systems with thousands of components are solved in seconds, making design optimization and what-if studies practical at system level.
Complete thermodynamic fluids library
IAPWS-IF97 steam and water (industrial standard), real gases (Peng-Robinson EOS), two-phase gas-liquid mixtures, refrigerants (R134a, R410A, R717), and cryogenic fluids (liquid oxygen, hydrogen, nitrogen). Custom fluid properties can be imported.
Transient analysis — water hammer and start-stop
Flownex SE uses the Method of Characteristics (MOC) for transient pipeline analysis: water hammer from fast valve closure or pump trip, start-stop cycles of turbines and compressors, emergency shutdown sequences. Time-resolved pressure-time histories at every network node.
Direct ANSYS Workbench integration
Two-way coupling with ANSYS Mechanical and ANSYS Fluent: Flownex system boundary conditions (pressures, temperatures, flow rates) are transferred to ANSYS Fluent for detailed CFD of critical components; thermal loads from Flownex are applied to ANSYS Mechanical for pipe stress and fatigue analysis.
Comparison
Flownex SE vs ANSYS Fluent (CFD)
Flownex and Fluent answer different engineering questions. Together via ANSYS Workbench coupling, they provide both system-level and component-level fidelity.
FeatureFlownex SEANSYS Fluent
Approach1D network simulation3D CFD (finite volume)
Solve timeSeconds to minutesHours to days
System scaleThousands of components1–3 components in detail
Transient / water hammerNative MOC methodNot specialized
Thermodynamic cyclesNative (Rankine, Brayton)Not specialized
ANSYS integrationDirect bidirectional couplingNative ANSYS solver
Two-phase flowNative (VOF not needed)Volume of Fluid (VOF)
Typical Flownex SE workflow: from network diagram to system report
1
Network Setup
Build the system network diagram: pipes, pumps, compressors, heat exchangers, valves, vessels. Select from built-in component library or define custom components.
2
Fluid Properties
Select working fluid: steam (IAPWS-IF97), natural gas, refrigerant, cryogenic fluid. Flownex automatically retrieves density, viscosity, and enthalpy from built-in thermodynamic tables.
3
Boundary Conditions
Specify inlet/outlet pressures and temperatures, pump speed curves (H-Q), valve Cv coefficients, heat exchanger duty, and compressor maps.
4
Solve & Optimise
Steady-state or transient solution. Review pressure, temperature, and flow rate at every node. Identify bottlenecks. Optimise component sizing.
Industry Applications
Where Flownex SE is applied
Power generation, oil & gas, nuclear, aerospace, rocket propulsion, and HVAC — Flownex SE wherever system-level thermal-hydraulics matter
Power Generation: Steam & Gas Cycles
Thermodynamic cycle simulation for steam power plants, combined cycle (CCGT), and industrial co-generation: heat balance, efficiency optimization, off-design performance, and transient startup/shutdown analysis.
Steam Rankine cycle: heat balance and efficiency
CCGT plant: gas turbine + HRSG + steam turbine
Regenerative feedwater heating train design
Emergency shutdown and trip analysis
Oil & Gas: Pipeline & Process Systems
Pipeline hydraulics, gas compression station design, separator and scrubber hydraulics, pump station optimization, and water hammer analysis for emergency valve closure scenarios.
Hydraulic gradient calculation for gas pipelines
Water hammer analysis: emergency valve closure
Pump station optimisation and parallel operation
Two-phase gas-liquid flow in production tubing
Aviation: ECS & Engine Cooling
Environmental Control System (ECS) design and analysis, engine secondary air system (cooling and sealing), bleed air system hydraulics, and hydraulic actuation system performance.
ECS: cabin pressurisation and temperature control
Engine secondary air system (turbine cooling)
Bleed air system: pressure and flow balancing
Hydraulic actuation: accumulator and pump sizing
Nuclear: Primary & Secondary Circuits
Thermal-hydraulic analysis of nuclear reactor primary and secondary cooling circuits, emergency core cooling systems (ECCS), loss-of-coolant accident (LOCA) simulation, and safety system design per IAEA.
PWR/BWR primary circuit steady-state analysis
ECCS actuation and safety injection flow rates
LOCA: transient blowdown and reflooding
Decay heat removal system design
Rocket & Space Propulsion
Propellant feed system hydraulics for liquid rocket engines: pressurisation system design, turbopump analysis, propellant line water hammer during engine start and cut-off, and cryogenic fluid handling.
Liquid rocket propellant feed system
Tank pressurisation: blowdown and regulated
Turbopump: performance map integration
Cryogenic transfer line: boil-off and pressure drop
HVAC & Building Services
Chilled water and heating water distribution network design, air handling unit (AHU) performance, heat pump cycle simulation, and data centre cooling system analysis.
Chilled water network: pump sizing and balancing
Chiller and heat pump thermodynamic cycle
AHU coil: heating and cooling duty calculation
Data centre: cooling system reliability analysis
Licensing & Procurement
Flownex SE in Ukraine: license, price, configurations
Where to buy
How to get an official Flownex SE license in Ukraine?
CADFEM Ukraine is the official Flownex SE distributor and ANSYS Channel Partner in Ukraine. We provide official Flownex SE licenses with full technical support, English-speaking engineering team, training, and thermal-hydraulic consulting. Contact us for a commercial proposal.
Pricing
How much does Flownex SE cost?
Pricing depends on license type (lease or perpetual) and configuration — base Flownex or with industry-specific modules (nuclear, aerospace). Submit a request for an individual quote based on your engineering application.
vs Fluent
Why use Flownex SE instead of ANSYS Fluent for piping system analysis?
Flownex SE and ANSYS Fluent serve different scales. Flownex: 1D system-level analysis of entire networks (hundreds of pipes, pumps, heat exchangers) solved in seconds — ideal for system design, optimisation, and transient analysis. Fluent: 3D CFD of a single component in detail (valve, heat exchanger internals) solved in hours. Optimal approach: Flownex for system analysis + Fluent for detailed CFD of critical components, coupled via ANSYS Workbench.
ANSYS integration
How does Flownex SE integrate with ANSYS tools?
Flownex SE has direct bidirectional coupling with ANSYS Workbench: boundary conditions (pressures, temperatures, mass flow rates) from Flownex are passed to ANSYS Fluent for detailed component CFD; temperature fields from Flownex are applied as thermal loads in ANSYS Mechanical for pipe stress analysis and fatigue life assessment. This enables a multi-fidelity workflow: 1D system analysis + 3D component analysis in one project.
CADFEM Ukraine Services
Training, thermal-hydraulic consulting & installation
Training
Where to get Flownex SE training in English?
CADFEM Ukraine conducts Flownex SE training in English and Ukrainian — classroom and online. Courses: Introduction to Flownex (network setup, pumps, heat exchangers, transient analysis), Advanced Flownex (two-phase flow, nuclear circuits, rocket propulsion, ANSYS coupling), and corporate training tailored to power, O&G, or aerospace applications.
Consulting
Does CADFEM Ukraine provide Flownex SE system analysis on contract?
Yes. Our consulting team performs Flownex SE thermal-hydraulic analyses on contract: power plant cycles, pipeline hydraulics, nuclear circuit analysis, rocket propellant systems, HVAC. Deliverables include system-level performance maps, pressure and temperature profiles, transient responses, and engineering recommendations in English.
Installation
How to set up Flownex SE with ANSYS integration?
Our engineers perform Flownex SE installation end-to-end: software deployment, ANSYS Workbench coupling configuration, license server setup, and validation. English-speaking post-installation support included.
FAQ
Frequently asked questions about Flownex SE
Technical, licensing, or thermal-hydraulics questions — our English-speaking engineering team responds within one business day.
+38 (050) 454-37-54What is Flownex SE and how does it differ from ANSYS Fluent for thermal-hydraulic analysis?
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Flownex SE is a 1D thermal-hydraulic system simulator — it models entire piping networks, thermodynamic cycles, and fluid systems as networks of elements (pipes, pumps, heat exchangers, valves, vessels) and solves steady-state or transient behaviour in seconds. ANSYS Fluent is a 3D CFD solver — it resolves the detailed flow field inside a single component with high spatial resolution but requires hours to days of computation. For system-level analysis (entire power plant steam cycle, pipeline network, rocket propellant feed system), Flownex is the right tool; for detailed component design (heat exchanger internals, turbine stage), Fluent is used. The optimal approach couples both via ANSYS Workbench.
What working fluids does Flownex SE support?
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Flownex contains a comprehensive thermodynamic fluid database: steam and water (IAPWS-IF97 — the international industrial standard for power plant calculations); natural gas and methane with real-gas properties (Peng-Robinson EOS); two-phase gas-liquid mixtures for oil-gas and refrigeration applications; refrigerants including R134a, R410A, R717 (ammonia), and R22; cryogenic fluids including liquid oxygen, liquid hydrogen, and liquid nitrogen (critical for rocket propulsion); air with real-gas corrections; and user-defined custom fluids via property table import.
What is water hammer and how does Flownex SE model it?
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Water hammer (hydraulic transient) is the pressure surge that occurs when a flowing fluid is rapidly decelerated — typically by fast valve closure or sudden pump trip. The resulting pressure wave propagates through the piping system at the speed of sound in the fluid, potentially causing pipe rupture or fitting failure. Flownex SE uses the Method of Characteristics (MOC) — the established industry-standard numerical method for transient pipe flow — to compute the pressure-time history at every node in the network following a transient event. This is essential for pipeline safety assessment per ISO 10816 and power plant emergency shutdown analysis.
What are the nuclear industry modules in Flownex SE?
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Flownex SE has specialized nuclear industry capabilities: IAPWS-IF97 steam/water properties used in nuclear primary circuit analysis; primary circuit model for PWR and BWR reactors — coolant flow through reactor core, pressurizer, steam generators, main coolant pumps; emergency core cooling system (ECCS) simulation — high-pressure and low-pressure injection flow rates during loss-of-coolant accident (LOCA); decay heat removal system design; and point kinetics reactor model for coupled neutronics-thermal hydraulics. Flownex SE nuclear models have been validated against plant data from operating nuclear power stations.
How does Flownex SE model a rocket propellant feed system?
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Flownex SE models liquid rocket propellant feed systems as a network: tank pressurisation (blowdown or regulated helium/nitrogen), propellant lines with pipe friction and fittings, turbopump (with performance maps H-Q), injector plate pressure drop, and combustion chamber conditions. Transient analysis covers engine start sequence (valve opening sequence and fill time), operating point tracking, and engine cut-off (water hammer in feed lines). This is used for system-level feed system design before detailed 3D CFD of individual components.
Does CADFEM Ukraine provide Flownex SE support in English?
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Yes. CADFEM Ukraine provides all Flownex SE services in English: official license procurement, technical support, thermal-hydraulic simulation consulting, and training. We support international engineering companies operating in Ukraine, Ukrainian energy and aerospace organizations working on export projects, and process engineers requiring system analysis reports in English for international clients or certification bodies.
Get Flownex SE in Ukraine
Official Flownex SE license from CADFEM Ukraine
Official Flownex SE distributor in Ukraine. Licenses, English-speaking thermal-hydraulic engineering support, system simulation consulting for power generation, nuclear, oil & gas, and aerospace companies.
Request a commercial proposal
We respond within one business day · No obligation