Submarine CFD simulation using Ansys Fluent

In this project, a submarine moving underwater has been simulated. You can access CAD and mesh files and simulated files by purchasing this product. With the purchase of this product, a training video will be sent to you about the Fluent simulation steps and a full explanation of the options.



In this project, a submarine moving underwater has been simulated. Submarines are essential military equipment in seas and oceans. They are used for transporting equipment and personnel, underwater battles, scientific research, and other purposes. Submarines are divided into two main categories: military submarines and commercial submarines. Military submarines are extremely dangerous for the enemy. They are always on the move for hazardous and covert missions, making them an unknown threat to the enemy because they are hidden and can strike without being seen.

World navies always replace old submarines with ones with higher capabilities and advanced technology, so research on submarines is paramount. For this purpose, we have simulated a submarine to obtain lift and drag coefficients in this project. Another important research conducted on submarines is the study of noise reduction in submarines, which we will deal with in another project.



The project was conducted in 3D and designed using space claim software. The geometry was meshed using Ansys meshing software, and the number of elements used in this project was 877,071. The input boundary condition was defined as a velocity inlet with a value of 5 meters per second. The output boundary condition used was a pressure outlet with zero-gauge pressure. The simple algorithm was used to couple velocity and pressure for solving this project.


After simulation and convergence, we can observe the contour of velocity and pressure.


Based on the velocity and pressure contours, we can see that a singularity has occurred at the tip of the submarine, where the velocity has reached its minimum value, namely zero. According to the Bernoulli equation, velocity and pressure have an inverse relationship, so minimizing the velocity maximizes the pressure. On the other hand, in the back area of the submarine, we also have a low-pressure area. This pressure difference between the front and back of the submarine introduces a force that resists movement to the submarine, which is called drag force.


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