Computational Fluid Dynamics

Longitude Engineering has extensive experience covering fluid flow problems and the use of turbulence-resolving modelling approaches for various physical and application areas. Our specialists have been working across all industries with special focus in the marine, energy and other offshore sectors.

Custom developed Tools and dedicated in-house services

We develop and use the open source OpenFOAMĀ® CFD Toolbox on our dedicated in-house multiprocessor CFD computer and utilise cloud computing services for quick processing of results. The applications of Computational Fluid Dynamics (CFD) are many and varied, however some specific applications are outlined below.


Aerodynamics modelling allows us to understand the air flow around marine vehicles or offshore structures for design improvement as well as efficient operation. Our scope of work covers all aspects of aerodynamic analysis relating to the marine vehicle or offshore structure including flight-deck turbulence and wind loads. Using turbulence-resolving modelling approaches such as Large Eddy Simulation (LES) or Detached Eddy Simulation (DES) gives us some idea about the boundary layer profile,Ā  velocity and pressure distribution around the vehicle or structure including forces and moments, which helps us to optimize the design and improve aerodynamic efficiency.

Typical analysis type include:

  • Flight-deck turbulence computations
  • Exhaust gas plume studies
  • Aerodynamic performance of Blades
  • Vortex induced vibrations
  • Wind turbine loadings due to large-scale turbulence


CFD allows us to analyse, understand and improve flow around ship hulls, propulsors, rudders and energy saving devices. Our CFD code is continuously validated with both model and ship-scale measurements and can predict with high level of accuracy resistance and propulsive performance in both calm water and various sea conditions resulting in a fast turnaround time in the design phase.

Typical analysis types include:

  • Resistance and powering calculations
  • Wake flows and appendage alignments
  • CFD based derivatives for manoeuvring prediction
  • Tugs and tow force analysis
  • Hull-propeller-rudder interaction
  • Hull optimisation

Thermal Analysis

Our typical analysis types include:

  • Optimisation of electronics package cooling
  • Printed circuit board designs
  • Heat exchanger design and analysis

Key Contacts

Managing Director Maritime

Southampton, Longitude

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Case Studies View All

Spud Can Cracking Root Cause Analysis

The Spudcan structure on an accommodation jack-up was showing regular through thickness cracks at the leg/can interface and requiring expensive repair and replacement operations at every dry-dock. Longitude was requested…

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Longitude were contracted by Osprey Shipping to undertake the engineering for the transportation of the offshore wind farm substation topsides from the fabrication yard to site. The first tasks were…