Poiseuille's Law: A Visualization of Flow

We now consider combinations of the parameters changing. As in all of the earlier visual explorations of the flow, each graph will have a black portion referring to the current values, while the red portion refers to the standard values. The table below corresponds to 5 percent changes in the pressure (P), viscosity (V) and radius (R) (+ or -). Recall that the standard values are P=50 mmHg, n=0.05 P, and r=0.015 mm.

Challenge! See if you can guess which of the situations will occur:

• Parameters change, but the velocity and flow do not.
• The flow goes up, but the maximum velocity does not.
• The flow goes down, but the maximum velocity does not.
• The flow stays the same, but the maximum velocity goes up.
• The flow stays the same, but the maximum velocity goes down.

Click on the links to see the graphics:

P-V-R- P-V- P-V-R+	P-R- P- P-R+	P-V+R- P-V+ P-V+R+
V-R- V- V-R+	R- Standard R+	V+R- V+ V+R+
P+V-R- P+V- P+V-R+	P+R- P+ P+R+	P+V+R- P+V+ P+V+R+