#### Using Boundary Conditions: Summary

The answers to the ConcepTests are given below and will open in a separate window.

##### Key points from this module:

- The Naiver-Stokes equation can typically be significantly simplified by cancelling out terms that do not pertain to the problem on interest.
- One boundary condition is needed for each integration constant.
- Common boundary conditions include: no-slip boundary condition at contact with surfaces, no shear stress at contact with atmospheric conditions, and no shear stress at lines of symmetry.

##### From studying this module, you should now be able to:

- Simplify the Navier-Stokes equation based on the system of interest.
- Integrate a simplified Navier-Stokes equation.
- Determine the appropriate boundary conditions to apply.
- Apply boundary conditions to obtain a velocity profile.

*Prepared by Janet deGrazia, Department of Chemical and Biological Engineering, University of Colorado Boulder*