Steady and unsteady

The flows studied in fluid mechanics are divided into two categories, steady flows, and unsteady flows, in terms of the dependence of the flow characteristics on time. In this section, we introduce steady and unsteady flows and mention the reasons that cause the flow to become unstable. Finally, we discuss using Fluent software to simulate […]

porous medium

Porous medium A porous medium is a body that contains pores or cavities and is permeable to fluids. A porous medium is a kind of object that can be used in many industries, such as oil and gas, water treatment, and agriculture. The porous medium has unique properties that can be used in special applications […]

Rotating and Swirling flows

Circulating, vortex or rotational flows are important in nature and industry flows. These flows are called vortexes in nature, seen in air and sea storms. In industry, they are also called Rotating flow, such as the flow around a spinning rocket (or the flow inside a rotating tube), or rotational flows, such as the fluid […]

Reacting flow

Flows with reactions are widely used in various industries, and their study and analysis are very important to us. One of the most widely used examples of reactive flows is the flow inside the combustion chamber. Combustion occurs in combustion chambers when fuel and air combine, releasing much energy as heat. Combustion chambers are one […]


Multiphase flows are among the widely used flows in industries and nature. Therefore, the knowledge and analysis of these flows are essential for us. These flows can be liquid-liquid, gas-liquid, gas-solid, liquid-solid, or a combination of all three phases, i.e., solid-liquid-gas. In this section, we introduce different multiphase flows and mention some CFD models developed […]

Flows with heat transfer

Flows with heat transfer Flows with heat transfer are one of the common cases of flows in nature or industry. Blood flow in a vessel or fluid flow in heat exchangers are all flows with heat transfer. Heat is a type of energy transferred from one to another due to the temperature difference between two […]

Non-Newtonian fluid

In this section, we want to introduce Newtonian and non-Newtonian fluids using the concept of viscosity. We know that the viscosity of different fluids depends a lot on the type of fluid. According to the definition of viscosity, it is called the fluid’s resistance to flow. First, we will explain the definition of Newtonian fluid […]

Laminar and turbulent

Laminar and turbulent flow In terms of turbulence, flows are divided into two categories: Laminar flow and turbulent flow. In laminar flow, the fluid moves in layers, and the layers slide on each other and have a laminar and regular movement. But in turbulent flow, different fluid layers collide and have a turbulent and unpredictable […]

Compressible and incompressible

Introduction We know that fluid flow is divided into two types of compressible flow and incompressible flow in terms of compressibility. Compressible flow is mainly seen in gases, and liquids are mostly incompressible. Studying and understanding compressible and incompressible flows in designing complex equipment such as airplanes, missiles, engines, turbines, and compressors is very important […]

Energy Engineering

Energy Engineering Energy engineering is a field that deals with the production, storage, and use of energy. This field includes developing efficient systems for generating energy from natural sources such as solar, wind, and geothermal energy. It also consists of designing and operating power plants to produce electricity. Energy engineering has become very important in […]