Introduction

FluidFlow is a modular hydraulic engineering and pipe system design software for modeling liquid, gas, slurry, and two-phase flows. It supports pump sizing and selection, control valve Cv calculation, back-calculation, multi-calc comparisons, and integrates heat transfer by default—all in one intuitive interface.

Modular Calculation Environment

FluidFlow offers the following calculation modules (all include heat transfer by default):

1. Liquid (Incompressible Flow)

Uses Darcy–Weisbach, Hazen–Williams, or fixed friction for pressure loss
Includes economic velocity sizing, roughness, and scaling

2. Gas (Compressible Flow)

Real gas modeling with property tracking (density, temperature, enthalpy)
Accounts for the Joule–Thomson effect
Handles choked and sub-critical flows

3. Two-Phase (Liquid–Gas)

Correlations: Beggs–Brill, Chisholm–Baroczy, Friedel, Lockhart–Martinelli
Automatic selection via Whalley Criteria
Models constant quality, flashing, and condensing flows

4. Slurry Module

Models settling slurries with WASC, Durand, WASP, Four-Component, Liu Dezhong correlations
Handles non-Newtonian fluids (Bingham Plastic, Herschel-Bulkley, Casson, Power Law)
Calculates Deposition Velocity and includes inclination effects

5. Heat Transfer

Conduction, convection, and radiation models
Heat exchangers, buried pipe heat loss, and fixed transfer rate options

6. Dynamic Analysis & Scripting

Pascal and Basic scripting for custom tasks
Transient pump turndown, valve control, and depressurization

7. Back-Calculation

Reverse-engineer input parameters from known outputs

8. Multi-Calc

Run multiple scenarios in parallel and compare results

Auto-Equipment Sizing

FluidFlow automatically sizes:

Pipes — economic velocity, fixed velocity, or pressure gradient
Pumps — targets Best Efficiency Point (BEP)
Control Valves — ANSI/ISA Cv calculations
Relief Valves & Bursting Discs — API 520, ISO 4126 compliant
Flow Measurement Devices — Orifice Plates, Venturi Tubes, Nozzles per ISO 5167

Usability & Efficiency

Single workflow across all modules
Interactive charts: pump curves, system curves, energy grade lines
Built-in databases: fluids, fittings, pumps, valves, K-factor data
Custom components: create and store proprietary items
80% faster than spreadsheets; 40% faster than comparable software

Accuracy & Standards Compliance

Control valves: ANSI/ISA-75.01.01
Flow measurement: ISO 5167-1:2003
Relief devices: API 520 Part 1, ISO 4126
Validated correlations: Beggs–Brill, Chisholm–Baroczy, Friedel, Lockhart–Martinelli, WASC, Durand, WASP, Four-Component, Liu Dezhong
Verified against Crane Technical Paper 410, Idelchik, Miller references
Over 300 QA test networks maintained
Developed by an ISO 9001 certified team since 1984