Run a pipe flow simulation with an inlet Reynolds number of 100,1000 and 10,000.

Aim : Run a pipe flow simulation with an inlet Reynolds number of 100,1000 and 10,000.

For each of these cases do the following

1. Place line probes at 95%, 90% and 85% of the pipe length.
2. Compare the normalized velocity profile at each of these locations
3. Normalize the velocity profile by the inlet velocity.

Introduction :

Flow simulation is a form of computational fluid dynamics which digitally replicates flows in surface water or collection systems. Performing flow simulation allows for the prediction and analysis of how a flow might be impacted by complex geometry in an operational environment.

Basic theory on the simulation:

The Reynolds number is defined as the product of density times velocity times length divided by the viscosity coefficient. This is proportional to the ratio of inertial forces and viscous forces (forces resistant to change and heavy and gluey forces) in a fluid flow.

Calculation of velocity :

Taking , Density =1000 kg/m^3

Diameter = 0.048m

Dynamic viscosity =1.002 Ns/m^2 at 20 degree Celsius

So for Reynolds number 100,1000,10000 the respective velocity will be 2.0875,20.875,208.75 m/s.

Entire case setup:

Creating a Project ,Click Flow Simulation, Project, Wizard. The project wizard guides you through the definition of a new SolidWorks Flow Simulation project.

Use all Defaults option.

Specifying Boundary Conditions.

Creating some required X-y plots

Creating a cut plot.

Creating the mesh and changing the global mesh as per requirements.

Run the study.

Creat the parametric study and give input , output parameter,and scenario.

Mesh :

initial and boundary conditions applied:

Results and explanation:

Cut plot for Reynolds number 100:

X-y plot :

Cut plot for Reynolds number 1000:

X-Y plot :

Cut plot for Reynolds number 10000:

X-Y plot :

Normalize the velocity profile by the inlet velocity. :

Conclusion :

As Reynolds number Increasing the flow is going Laminar to Turbulent .