Spraying into the human lungs, Ansys Fluent Training

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In this project, Spraying into the human lungs  has been simulated and the results of this simulation have been investigated.

This product includes Geometry & Mesh file and a comprehensive Training Movie.
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Spraying Project Description

In this study, spraying in human lungs was investigated using the one-way DPM (Disctere phase material) method using Ansys Fluent software. In this simulation, two types of material are used: air and particles that enter the lungs in a Disctere phase material. Trajectories of particles within the lung were observed using Ansys Fluent software. The air inlet velocity enters the field at 5 m / s with a gravity of -9.81 m / s-2 on the z-axis.

Geometry & Mesh

The 3-D geometry of the present model is carried out using Spaceclim software. The inlet diameters of the Lugs are 50 cm.


For grid generation, unstructured mesh with 3734238 elements in the Ansys Meshing software was utilized. The curvature Method was used to focus on grid-sensitive areas. The following figure shows the mesh generation for this problem.


Spraying CFD Simulation

To simulate the present model, we consider several assumptions:

  • The solver is pressure-based.
  • The present simulation is performed as the steady-state.
  • The gravity effect is equivalent to -9.81 m.s-1.

For solving the above problem, RANS Includes discrete phase particles by integrating the force balance on the particles, which is written in a Lagrangian reference frame. This force balance equates the particle inertia with the forces acting on the particle.

Here is a summary of the steps for defining the problem and its solution in the following table:

Turbulence models
K-  viscous model
Realizable K- model
Standard wall Function Wall function
Discrete phase model (DPM)
Injection type: Surface velocity inlet
Diameter Distribution: Uniform
Diameter: 1e-4m
Total flow rate: 0.1/s
Material Properties
Inert-particle (impurities)
Amount Fluid properties
1550 Density (kg/m3)
Boundary Condition
name Type Amount (units)
Inlet Velocity inlet 5m/s

DPM= escape

Outlet 1 Pressure outlet 0 pa

DPM= escape

Outlet 2 Pressure outlet 0 pa

DPM= escape

Outlet mass outlet 0.005kg/s

DPM= escape

Wall flow wall stationary wall



Interior interior
Solution methods
Coupled pressure velocity coupling
Second-order pressure spatial discretization
Second-order upwind momentum
First-order upwind turbulent kinetic energy
First-order upwind      turbulent dissipation rate
Second-order upwind Energy
Initialize standard


Finally, extract the amounts of outlet velocity and pressure. In addition, we see Particle tracking in the lungs.

You can obtain Geometry & Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.


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