Species Transport Training Package, Beginner Part 1

Description

Species Transport ANSYS Fluent CFD Simulation Training Package for BEGINNER Users

This training package includes 10 practical Species Transport exercises using ANSYS Fluent software. MR CFD suggests this package for BEGINNER users new to this module.

Pollution

Project number 1 simulates changes in the mass fraction of carbon dioxide on an urban street. a 0.1 m height area should be considered as a source of carbon dioxide pollutants on the street from the urban domain. The main purpose of the current simulation is to investigate the effect of free airflow on the amount of CO2 produced by car exhaust. Therefore, an integrated carbon-dioxide production area is defined as a source of mass production on a city street.

Project number 2 simulates the effects of the oil tank detonation process in an urban area and the pollutant emission. In fact, in areas with oil reservoirs, one of the potential dangers is explosion. The explosion of these oil tanks can lead to the release of many pollutants such as carbon dioxide into the environment. Suppose there are residential areas and industrial units around the oil reservoirs in the mentioned area. In that case, the spread of these pollutants from the explosion and their transfer to the surrounding environment can be very dangerous and affect people’s lives.

In project number 3, using the Species Transport module, the gases from combustion in the car engine and their interaction with the open air in the urban environment were investigated statically and in traffic mode. For this purpose, the exhaust gas velocity was equal to 1 m / s, and the temperature was 400 K for the static state. In the second case, with the same speed and temperature of the exhaust gas, an external flow with 3 m / s enters due to the car’s movement in traffic mode.

In project number 4, a combustion reaction is simulated inside a combustion chamber. In a gaseous state, the volatile coal mixture enters the combustion chamber and mixes with high-temperature airflow (1623 K). As a result, the combustion process takes place. This process will also result in different productions, including pollutants like NOx, SOx, etc., which will be analyzed in this project.

Combustion (Species Transport)

In project number 5, methane-air fuel mixture combustion inside a gas turbine combustion chamber is simulated. Methane and oxygen are injected inside the combustion chamber with a velocity of 128.9304m/s and 12.0396m/s and a temperature of 286K and 109K, respectively. The fuel mixture is then ignited and energy and heat are generated. The Energy model is activated. Also, the species transport model is used to analyze the combustion process.

Project number 6 simulates the combustion process of diesel fuel inside a combustion chamber of a gas turbine system. The function of the combustion chamber is such that the airflow enters the chamber from the space around the chamber and then passes through a diffuser duct with blades, becomes disturbed, and enters the special combustion space to better mix with the fuel.

In project number 7, a combustion reaction is simulated inside a vortex combustion chamber. The energy equation is activated. The k-epsilon Standard viscosity model is used to analyze the turbulence of the two-phase current and the standard wall function is exploited for the regions near the walls. The species transport model is used to analyze the combustion process.

Project number 8 simulates non-premixed combustion. In fact, a two-dimensional combustion chamber is designed in which airflow and fuel flow enter simultaneously from two different inlets with different flow rates. The combustion process occurs when some air is combined with some hydrocarbon fuel to convert fuel energy into heat energy. After the combustion process occurs, the products of chemical reactions leave the combustion chamber.

Ventilation

In project number 9, the operating room HVAC, considering the equipment and persons within it, including the doctor and patient, is simulated using an air conditioning system. The source of the contaminants and excess gases is assumed on the patient’s body. The inlet air moves from the top to the bottom of the operating room for the clearing process and transfers contaminated gases and particles around the patient to the room’s corners.

Engine Manifold (Species Transport)

In project number 10, steady airflow mixing with fuel is investigated in a 3-outlet manifold where only one outlet is effective and the other 2 outlets are blocked. Two inlets provide air and fuel flow into the domain. Air and fuel flow rates are equal to 0.2335 and 0.0374 kg/s. Species entering the domain via air inlet are nitrogen and oxygen with mass fractions equal to 0.79 and 0.21, respectively. Species entering the domain via fuel inlet are CO, CH4, CO2, N2, and H2 with mass fractions equal to 0.06, 0.004, 0.1, 0.081, and 0.03 respectively.