Multi-Phase Flow in an Injector CFD Simulation
The present project is an injector CFD Simulation.
This ANSYS Fluent project includes CFD simulation files and training movies.
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Injector Project Description
The present problem is going to simulate an injector. The Multi-Phase model, which consists of air and water flows is used. Water flows through three curved ducts into a reservoir that only has airflow inside its space. The curved structure of the ducts and the cone-shaped state on the air-filled tank distributes the water flow vortices into the injector, thereby discharging the water out of the surroundings of the cylindrical chamber (near the chamber wall) of the injector.
There are several assumptions used for the present simulation:
The solver is Pressure-Based, the simulation is Steady, and the effect of Earth’s gravity on the model equals 9.81 m.s-2.
Geometry and Mesh
The 3-D geometry of the present model is designed by Design Modeler software. There are three ducts with a square cross-section for water flow, a conical-shaped area, and a cylindrical chamber. The meshing of the present model is performed by ANSYS Meshing software. The mesh type was unstructured and the element number was 102752.
Injector CFD Simulation (Multi-Phase)
Summaries of the problem definition and problem-solving steps are summarized in the table:
|standard wall functions||near-wall treatment|
|implicit||volume fraction formulation|
|Boundry conditions (injector)|
|mass flow inlet||Inlet type|
|0.01 kg.s-1||water – mass flow rate|
|0 kg.s-1||air – mass flow rate|
|Pressure outlet||Outlet type|
|0||water – backflow volume fraction|
|1||air – backflow volume fraction|
|Solution Methods (injector)|
|second order upwind||momentum|
|first order upwind||turulent kinetic energy|
|first order upwind||turulent dissipation rate|
|0||water volume fraction|
All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, Training File presents how to solve the problem and extract all desired results.