Pipe flow simulation

A pipe is designed in solidworks of the following dimensions, to perform the simulation

• External diameter = 50mm
• Internal diameter = 48mm
• Length = 1000mm
• Thickness = 1mm

The characteristics of the fluid which is flowing inside the pipe are as follows,

• Fluid : water
• Dynamic viscosity : 0.001792 kg/ms (at 0°C )
• Density : 1000 Kg/m³

The reynolds number equation is given as follows,

The simulation is carried out for three different reynolds number (i.e) 100, 1000 and 10000.

The velocities for these reynolds numbers are calculated using the formula, the matlab program to calculate the velocities is given below.

clear all
close all
clc

%inputs
renoylds_number = [ 100 1000 10000]
dynamic_viscosity = 0.001792
fluid_density  = 1000
diameter = 0.048

%Velocity calculation usinng renoylds number
velocity = (renoylds_number*dynamic_viscosity)/ (fluid_density*diameter)

The output obtained form the following program is as follows

velocity =

    0.0037    0.0373    0.3733

The velocities for different reynolds numbers are as follows,

`v_100 = 0.0037 ms^-1`

`v_1000 = 0.0373ms^-1`

`v_10000 = 0.3733ms^-1`

The pipe flow simulation is carried out with the following different boundary conditions,

• The inlet velocities is given at one end of the pipe.
• The other end of the pipe has static pressure.
• The wall of the pipe is a real wall.

The velocities are calculated at three different line probes at 850mm, 900mm and 950mm from the origin.

The following are the cut-plots at the line probe of 850mm from the origin

`v_100 = 0.0037 ms^-1`

`v_1000 = 0.0373ms^-1`

`v_10000 = 0.3733ms^-1`

The velocity comparison plot for 850mm distance from origin

The following are the cut-plots at the line probe of 900mm from the origin

`v_100 = 0.0037 ms^-1`

`v_1000 = 0.0373ms^-1`

`v_10000 = 0.3733ms^-1`

The velocity comparison plot for 900mm distance from origin

The following are the cut-plots at the line probe of 950mm from the origin

`v_100 = 0.0037 ms^-1`

`v_1000 = 0.0373ms^-1`

`v_10000 = 0.3733ms^-1`

The velocity comparison plot for 950mm distance from origin

These are the cut plots and velocity comparison graphs for different distances from the origin of the pipe.