Blood flow can either be
laminar or turbulent
turbulent
laminar
When the rate of blood flow becomes too
great, when it passes by an obstruction in a
vessel, when it makes a sharp turn, or when it
passes over a rough surface, the flow may
then become turbulent
1- Is the flowing of blood rapidly past the
heart valves.
2- high moving
3- disorganized random
4- high velocities
5- branching
6- the distribution is not uniform
7- more dense at the center
When blood flows through a long
smooth vessel it flows in straight lines,
with each layer of blood remaining the
same distance from the walls of the
vessel throughout its length
1 - Is the streamline flow which is
present in most blood vessels.
2- Slow moving
3- Organized , parallel to walls
4- Less velocities
5- Nonbranching
6- The distribution of velocities is
perfectly straight
7-greater velocity at the center
They both can be characterized by using
Reynolds
number .
Laminar flow is more efficient than turbulent flow , go to figure 4 page 6 plz .
Check also page 4 the critical velocity.
Oday Abdulqader