Adding ability to specify the inflow velocity profile type

[brookeslawski]

Addressing Issue #59

This PR removes the dependency of inflow type on the geometry module selected and instead allows the user to specify the desired inflow conditions at the inlet (x=0 plane).

Tasks:

• add inflow types
• edit tests to include new inputs
• update and test all existing examples: cyl2d, flag2d, cyl3d, panels3d
• add ability to specify initial flow everywhere in domain (not just at x=0 plane)

[eyoung55]

Made some minor changes to pass the tests, but overall this looks great! I think this crosses some things off the to-do list, but test them and see what you think (and/or if more testing is necessary).
Changes:

• specify loglaw and parabolic options for the test_flow_3dpanels and test_fsi2 tests
• make time_varying_inflow_window a float as opposed to a bool, the value sets the ramp up time, 0 means no ramping, i.e., the initial velocity is just u_ref
• moved some of the common pieces of code (e.g., prints, setting the value of time_vary_u_ref) outside the different cases for inflow profile type

[eyoung55]

Does this address your final checkbox for "add ability to specify initial flow everywhere in domain (not just at x=0 plane)"

[brookeslawski]

Does this address your final checkbox for "add ability to specify initial flow everywhere in domain (not just at x=0 plane)"

Yes! That's exactly the functionality I was talking about. Thanks.

[brookeslawski]

Planning to close this PR without merging as it has been superseded by PR #73