Compressible Pipe Flow Analysis & System Modeling Software

Applied Flow Technology (AFT) Arrow is practical fluid dynamic simulation software used to calculate pressure drop and flow distribution in gas piping and ducting systems.
Designed for compressible flow systems containing:

  • Steam
  • Compressed air
  • Chemical and petrochemical process gases
  • Natural gas transport
  • And many more

AFT Arrow is particularly useful for:

  • Pipe and Duct Sizing
  • Relief valve sizing and system calculations
  • Compressor and Fan sizing and Selection
  • Control Valve sizing and Selection
  • Simulating System operation and component interaction
  • Choked Flow calculations
  • Evaluating pipe insulation and heat transfer in pipes and heat exchangers
  • Troubleshooting existing systems to determine the cause of operational problems

Evaluate New Designs and Improve Your Installed Systems

AFT Arrow…

  • Accurately simulates individual system components and their interaction including effects of heat transfer, real gases and choked flow
  • Tightly integrates equipment characteristics, analysis and output with your system’s schematic representation
  • Provides a wide array of features without sacrificing your need for a short learning curve
  • Frees you to focus on your system, not the mechanics of software manipulation
  • Significantly improves the quality of systems engineering you can achieve, leading to less costly, more efficient and more reliable piping systems


  • Advanced marching methods provide highly accurate results
  • Detailed modeling for fans and compressors, control valves, heat exchangers and other components
  • Conduct compressor and fan energy cost analysis
  • Conduct thermal analysis including piping heat transfer and heat exchanger modeling
  • Scenario Manager tracks all design variants and operational possibilities in a single model file with data linkage
  • Integrated graphing and reporting
  • Built-in library of gases and fittings can be extended and customized
  • Built-in ASME steam properties
  • Optional Chempak™ add-on utility provides a thermophysical database of almost 600 gases – allows you to define non-reacting pre-mixtures,and simulate dynamic flow mixing


  • Understand the fluid dynamic and thermodynamic behavior of your system
  • Predict how pipes, valves, compressors, fans and other components will interact with each other
  • Evaluate the performance of new designs
  • Assure all design requirements are met
  • Identify and correct operational problems
  • Produce less costly, more efficient and more reliable piping systems

AFT Arrow Add-On Modules

With these software extension tools, you can quickly and efficiently complete projects. Utilize your AFT Arrow add-on modules within any version of AFT Arrow.

  • Goal Seek & Control Module (GSC) – Identifies input parameters that yield desired output values and simulates control functions.
  • Extended Time Simulation (XTS) – Define a wide range of operating conditions during a time simulation such as tank pressures, compressor speed variations, and more.
  • Automated Network Sizing (ANS) – Evaluates the complex interaction of system variables to reveal combinations of cost savings.