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Fidelity Fine Marine

Resistance and movement determined before the hull is built

Fidelity Fine Marine simulates free-surface water, 6DOF motion, and a propeller on the same hull—so performance is known long before the towing tank and sea trials.

Speak with a specialist Try Fidelity for free

The challenge

It costs you time and money

  • Tow tank tests take months and are limited to only a few variants
  • Free-surface water level and hull motion are related, but are modeled separately
  • The mesh must be rebuilt every time the hull or trim is changed
  • Support responses that take days

The solution

We give you control back

  • Free water surface, 6DOF motion, and propeller in the same calculation
  • Adaptive mesh refinement automatically follows wave and pressure gradients
  • Bearing and sliding grids for rotating and moving components
  • Local hotline with responses from a specialist on the same day

HOW IT WORKS

Built for Moving Water

Free water surface as a starting point

The interface is not an add-on to a general solver, but the core of the model—and that is where the marine issues are resolved.

Part of the Fidelity CFD platform

Shares a platform with Pointwise and Automesh. This is convenient when the hull is meshed in one place and the propeller in another.

Validated against reality

Tow tank, PIV measurements, and full-scale sea trials. Used by America’s Cup teams and Vendée Globe participants.

VALUE

Fine Marine covers everything from hull resistance to maneuvering

From free-surface flow and motion to propellers, cavitation, and sea states—designed to address the questions a naval architect actually has to answer.

Modstand og fremdrivning

The first question is almost always how much drag the hull creates and what it takes to move it.

Full-scale resistance calculationNo scaling from model tests
Self-propulsion with a propellerHull and propeller in the same calculation
Trim and Draft as VariablesSame hull, multiple load conditions
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Frit vandspejl og bølger

The water surface is not a boundary condition. It is part of the solution, and it shifts as the process progresses.

Adaptive refinement at the surfaceThe solution follows the wave pattern
Regular and Irregular WavesDefined sea states
Green water and flushingWhere the surface breaks over the deck
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Bevægelse og søegenskaber

A vessel in the lake moves in six degrees of freedom, and its motion alters the flow around it.

6DOF motionFree or partially locked as needed
Multiple Moving ObjectsVessel and cargo, or mother ship and daughter ship
Modal Fluid-Structure InteractionWhere the hull deforms under load
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Propel og kavitation

The propeller is both the source of propulsion and the most common source of noise, vibration, and erosion.

Rotation via sliding gridsTrue geometry, not a force model
Cavitation and VentilationWhere and when it occurs
Overhead grids for complex movementsRudders, fins, and movable appendages
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Serier og automatisering

The value rarely lies in a single calculation, but rather in the series of calculations that determine the design choice.

Automated RunsHundreds of variants without corresponding staffing
Consistent layout across the seriesThe same method yields comparable figures
Directly from Pointwise and AutomeshMesh to solver without conversion
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Martin Lange
Martin LangeHead of Support & Service

Implementation

How FineMarine Works in Practice

Engineering-Ready SetupWe help you configure Fine Marine for the types of vessels your team works with—merchant ships, high-speed vessels, workboats, or offshore units—so that the initial calculation uses the correct sea conditions and degrees of freedom rather than default values.
Integration with Your ToolchainWhile the hull is meshed in Fidelity Pointwise and the propeller in Fidelity Automesh, we help connect the steps so that the mesh enters the solver without conversion and without losing boundary conditions.
Local expertise and ongoing supportYou’ll have access to specialists with practical experience in marine CFD—not just software licensing—so questions about specific sea conditions, propeller configurations, or convergence will receive concrete answers during an active project.
Explore your possibilities Get to know Nordcad

Ready?

Ready to design with peace of mind?

A brief conversation is usually enough to determine whether Fidelity Fine Marine is the right choice. No sales pitch. No pressure. Just an open discussion about the types of vessels and design issues your team is working on.

Speak with a specialist Try Fidelity for free

FAQ

Frequently Asked Questions

Not exactly, and that’s not the point either. Fine Marine brings the validation process forward: You can test many more variants in simulation than you could ever test in a towing tank, and use the simulation to validate the design you’ve settled on. The results are validated against towing tank tests, PIV measurements, and full-scale sea trials.

Both options are possible. For self-propulsion and cavitation analysis, the propeller is modeled as a true rotating geometry using sliding grids. For resistance tests, where the propeller is not the focus, a force model is faster and sufficient. The choice is made during setup, not in the license.

Fine Marine has its own built-in meshing capability, but many users combine the two: the hull in Fidelity Pointwise—where the CAD geometry is rarely clean—and the propeller in Fidelity Automesh. Both export directly to Fine Marine without conversion.

Fidelity Flow is the general-purpose solver for flow and heat transfer across industries. Fine Marine is designed specifically for open-surface water and for vessels moving in six degrees of freedom. Whether the question involves the hull, the propeller, waves, or seakeeping characteristics, Fine Marine is the quickest way to the answer.

Contact us

Let us review your setup – without obligation.

A brief dialogue is often enough to clarify if Nordcad is the right choice for you. No pitch. No pressure.

Contact us +45 96 31 56 90
15+ specialists