Short Wave in the Sea CFD Simulation, Ansys Fluent

Short Wave in the Sea CFD Simulation, Ansys Fluent Tutorial

In this project, Short Wave in the Sea CFD Simulation has been done using Ansys Fluent software. The purpose of this project is to investigate the ability to simulate short waves with First-Order Airy theory in Fluent software and the VOF model with the open channel wave bc has been used.

Geometry & Mesh

The two-dimensional geometry of this project has been produced with SpaceClaim software. The length of the computational area is 210 cm and its height is 76 cm.

The meshing of this present model has been generated by Ansys Meshing software. The mesh grid is unstructured and the total cell number is 55468.4

Short Wave CFD Simulation

To simulate the present model, several assumptions are considered, which are:

• The solver is pressure-based and transient.
• Simulation has only examined fluid behavior; in other words, heat transfer simulation has not been performed.
• The effect of gravity on the flow is considered to be 9.81 m.s-2 and along with the y-axis in the present model.

 The Laminar viscous model has been used to solve the flow field equations, and the pressure-velocity coupling scheme is SIMPLE. The second-order upwind discretization method has been used for momentum and PRESTO! For pressure discretization.

The following is a summary of the steps for defining the problem and its solution.

Models
Multiphase
	Homogeneous model	Volume of fluid
	Number of Eulerian phases	2(air& water)
	Interface modeling	Sharp Interfacial
	Formulation	explicit
	Body force formulation	Implicit body force
Viscous		Laminar

Material Properties
Air
Density	1.225
viscosity	1.7894e-05
water-liquid
Density	998.2
viscosity	0.001003

Methods
Pressure-Velocity Coupling		SIMPLE
	Pressure	PRESTO!
	Momentum	Second-order upwind
	Volume fraction	Compressive

Initialization
Initialization methods		Standard
Patch	Phase	Phase2
	Variable	Volume Fraction
	Registers to patch	Region_0
	Value	1

Run calculation
Time advancement	Type	adaptive
Parameters
	Initial time step size	0.001
Settings	Minimum time step size	0.0001
	Maximum time step size	0.0001
	Time step size	20000

Results

In Fluent software, it is possible to send waves from the input boundary condition into the domain. According to the speed counters, it is clear that when the waves move at sea level, vortices are created in the surrounding air and it can be said that the intensity of air turbulence is proportional. It is the height of the waves, which is why we see strong winds when we stand by the sea of waves.