Fluids Regime
Fluids and Flow Regime

Mr-CFD offers a complete range of CFD analysis, consulting services and training in fluid mechanics

# Fluid mechanics and flow regime

Fluid mechanics deals with the different flow regime and fluids. Its study is important to physicists, whose main interest is in understanding phenomena. The study of fluid mechanics is just as important to engineers. Their main interest is in the applications of fluid mechanics to solve industrial problems.

Aerospace engineers may be interested in designing airplanes that have low resistance and at the same time, high “lift” force to support the weight of the plane. Civil engineers may be interested in designing irrigation canals, dams, and water supply systems. Pollution control engineers may be interested in saving our planet from the constant dumping of industrial sewage into the atmosphere and the ocean. Mechanical engineers may be interested in designing turbines, heat exchangers, and fluid couplings. Chemical engineers may be interested in designing efficient devices to mix industrial chemicals.

The objectives of physicists and engineers, however, are not quite separable because the engineers need to understand and the physicists need to have motivation through applications. Fluid mechanics, like the study of any other branch of science, needs mathematical analysis, experimentation and computational simulations.

When you think about fluids application, almost everything on this planet either is a fluid or moves within or near a fluid. For instance, to name a few of enormous applications: breathing, blood flow, swimming, pumps, fans, turbines, airplanes, ships, rivers, windmills, pipes, missiles, icebergs, engines, filters, jets, and sprinklers, etc.

# Fluids and flows regime can be classified in different groups

## Ideal fluids versus real fluids

Ideal fluids are those incompressible fluids without viscosity, while real fluids which exist in nature are incompressible with viscosity.

## Newtonian versus non-Newtonian fluids

A fluid which has a linear relationship between shear stress and velocity gradient is called Newtonian fluid and on the other hand when this relationship is not linear the flow is called non-Newtonian.

## One, two, and three-dimensional flows

Velocity distribution defines that the flow is one, two or three dimensional depending on whether velocity variations is in one, two or three dimensions.

## Viscous versus inviscid flows

The areas in flow field which the viscosity is dominant (near walls) the flow is viscous. In some region of flows we can neglect the effects of viscosity in comparison to other forces; in these regions, the fluid flows is considered inviscid.

## Internal versus external flow

Internal flows are flows forced to move through confined channels, while flows over surfaces are external flows.

## Laminar versus turbulent flow

Flows in which the fluid viscosity is important can be of two types, namely, laminar and turbulent. If the fluid is moving in parallel layers the flow is called laminar and if the flow is moving randomly the flow is turbulent. By computing Reynolds number we can predict whether the flow is laminar or turbulent.

In steady flows, there is not any property which varies with time. And if the flow is not steady and we have variations in time the flow is unsteady.

## Incompressible and compressible flows

If density is changed during fluid flow, flow is compressible. Mach number is a non-dimensional number that can predict id the flow is compressible. The density of liquids are considered constant; therefore, we can treat liquid flows as incompressible flows in most applications.

# Mr CFD Company services

Portfolios

These are our latest successful projects.

Cavitation Simulation in Francis Turbine by ANSYS Fluent
Free Surface Flows (Multiphase), Mechanical, Renewable, Turbomachinery

## Cavitation Simulation in Francis Turbine by ANSYS Fluent

Cavitation simulation in Francis turbine by ANSYS Fluent One of the most prevalent applications of fluid mechanics is Turbomachinery designing.…

Combustion chamber in the gas turbine engine by ANSYS Fluent
Combustion, Heat Transfer, Mechanical, Reacting Flows and Combustion, Single-Phase, Non-Reacting Flows

## Combustion chamber in the gas turbine engine by ANSYS Fluent

CFD Simulation of the combustion chamber in the gas turbine engine by the ANSYS Fluent software Over the past twenty…

Air conditioning CFD simulation of the surgery room
Heat Transfer, Mechanical, Single-Phase, Non-Reacting Flows

## Air conditioning CFD simulation of the surgery room

Air conditioning CFD simulation of the surgery room using the ANSYS Fluent software One of the most important hazards in…

3-blade horizontal axis wind turbine (HAWT)-CFD simulation
Aerospace, Mechanical, Single-Phase, Non-Reacting Flows

## 3-blade horizontal axis wind turbine (HAWT)-CFD simulation

3-blade horizontal axis wind turbine (HAWT) CFD simulation by ANSYS Fluent software Wind turbines generally convert wind energy into electrical…

Real porous media CFD simulation by ANSYS Fluent software
Heat Transfer, Mechanical, Single-Phase, Non-Reacting Flows

## Real porous media CFD simulation by ANSYS Fluent software

Real porous media CFD simulation by ANSYS Fluent software Study of fluid flow in porous media is one of the…

CFD simulation of a real Unmanned Aerial Vehicle (UAV-Aircraft)
Aerospace, Mechanical, Single-Phase, Non-Reacting Flows

## CFD simulation of a real Unmanned Aerial Vehicle (UAV-Aircraft)

CFD simulation of a real Unmanned Aerial Vehicle (UAV-Aircraft) using ANSYS Fluent software Drones can be considered as small non-pilot…

Our Process

If you want to know what we will do with your project read our steps blow.

## STEP 2

Our colleagues will call you as soon as possible; then after advising you on your project, we will specify the steps of the project in detail, the fee and the delivery time for each step.

## STEP 3

After paying the deposit, we will start your project and the results of each step will be sent to you in the specified deadlines. Once you have investigated your results and confirmed it, the fee of that step should be paid.

## STEP 4

All of the results and files related to simulations will be sent to you and you will receive the required training.