Orca3D Marine CFD - General

Simerics-related questions

Using a Python script to automate the analysis of multiple speeds or RPMs
Attached you will find a script that is used to run multiple speeds or RPMs in succession automatically. Here are the steps to follow: In order to run a P...
Wed, 21 Mar, 2018 at 2:21 PM
Varying RPM in a Self-Propelled Analysis
When doing a powered run, you have the option of entering a fixed RPM (where the propeller starts at that value and remains there for the entire run), or yo...
Wed, 14 Feb, 2018 at 2:24 PM
How to Adjust the Heave and Pitch Damping During a Run to Look for Porpoising
Numerical damping is applied to Heave and Pitch by default to damp the oscillations that can result from rapid acceleration at the beginning of a run. Howev...
Tue, 19 Apr, 2022 at 3:24 PM
Waterjet Propulsion
The simplest way to model waterjet propulsion in Orca3D Marine CFD is to use a force vector as your propulsion source. This is very easy to do using the fol...
Sun, 1 Apr, 2018 at 8:45 PM
Fixing Heave and/or Pitch
By default, simulations generated in Orca3D Marine CFD include heave and pitch dynamics, i.e., they are free to sink and trim. You can turn off either or bo...
Sun, 13 Mar, 2022 at 12:54 PM
Including the Effects of a Nominal Wake Fraction
Orca3D Marine CFD includes the ability to perform self-propelled (also known as "powered") simulations. For self-propelled simulations the thrust ...
Fri, 1 Jan, 2021 at 4:45 PM
Analysis in Shallow Water
We have used Orca3D Marine CFD to perform simulations of vessels in shallow water and have validated predictions relative to published model test data. Perf...
Thu, 1 Apr, 2021 at 1:51 PM
What is Air Drag in Orca3D Marine CFD?
As engineers we've been taught that one way to solve a complex problem is to decompose it into a series of simpler problems, and then reconstitute the ...
Thu, 26 Mar, 2020 at 8:10 PM
Running an Analysis Starting from a Previous Run
We are often asked if it is possible and advantageous to start a resistance run with the results of a lower speed run or a self-propelled run with the re...
Thu, 29 Oct, 2020 at 11:30 PM
Pressure Definitions in Orca3D Marine CFD
This article is intended to clarify the pressure definitions used by Orca3D Marine CFD. As shown in the image below, when plotting pressure distribution...
Sat, 5 Feb, 2022 at 8:08 AM