Struphy perturbation

Shear_x

Double shear layer in eta1 (-1 in outer regions, 1 in inner regions).

Governing formula

u (η_{1}, η_{2}, η_{3}) = A (- tanh ((η_{1} - 0.25) / δ) + tanh ((η_{1} - 0.75) / δ) - 1) .

Can only be used in logical space.

The sampled perturbation value across the three logical coordinate planes.

Perturbation value ueta1–eta2 · -9.98e-5 to 9.97e-5

Perturbation value ueta1–eta3 · -9.98e-5 to 9.97e-5

Perturbation value ueta2–eta3 · 9.98e-5 to 9.98e-5

eta1 · other coordinates fixed at 0.5

eta2 · other coordinates fixed at 0.5

eta3 · other coordinates fixed at 0.5

Parameter	Value	Description
`amp`	`0.0001`	—
`delta`	`0.06666666666666667`	Characteristic size of the shear layer
`given_in_basis`	`null`	In which basis the perturbation is represented (see base class).
`comp`	`0`	Which component (0, 1 or 2) of vector is perturbed (=0 for scalar-valued functions)