PIV recording simulation settings

I: Periodical/4-roll-mill/shear/pipe flow

- Periodical: The periodical flow is determined with amplitudes (Ax,Ay) and wavelengths (, ) in X, Y and Z directions as:

- 4-roll-mill: The amplitudes (Ax,Ay) determine the maximal displacement component at the four corners of the image. The displacement distribution is

Vx=-2Ax(x-0.5L)/L,

Vy=2Ay(y-0.5H)/H,

Vz=0,

where L and H are width and height of the image, respectively.

- Linear-shear: Ax determines the maximal displacement of the linear shear. The displacement distribution is

Vx=2Ax(y-0.5H)/H,

Vy=0,

Vz=0,

where H is height of the image.

- Pipe flow: Ax determines the displacement at the pipe centerline. The displacement distribution is

- u=y^2 - Vx=Ax[1-(2y/h-1)^2], Vy=0, Vz=0;

- u=y^4 - Vx=Ax[1-(2y/h-1)^4], Vy=0, Vz=0;

- u=y^8 - Vx=Ax[1-(2y/h-1)^8], Vy=0, Vz=0;

where h is height of the pipe in the image, which is input in the right one (Y) of the two edit boxes indicated by Wavelength or pipe size.

II: Solid body rotation & potential flow

A solid, round rotation body surrounded with potential flow.

- Radius of rotation body [pix]
r1 -
Radius of the rotation solid body in pixels;
r2 - Radius of the outside boundary in pixels;

- Position [pix]
X -
X-position of the solid body rotation center in pixels;
Y - Y-position of the solid body rotation center in pixels;

- Boundary layer thickness [%] - Percentage of the boundary layer thickness to the in the potential flow width on both sides when mask Pipe is selected;

- Rotation angle [1/100 degree] - Rotation angle of the solid body between;

- Mask: None - Both inside solid body motion and outside potential flow are included;

- Mask: Solid body - Only inside solid body motion is included;

- Mask: Flow - Only outside potential flow is included

- Mask: Pipe - Zero velocity boundary condition is added to the potential flow.

III: Uniform flow

A constant displacement (X, Y, Z) is added in the simulated flow field and superimposed to simulated flow determined in II or III.

Save a reference flow map into

M0 - The flow (displacement) field that determines the particle image movement in the synthetic PIV image pair can be saved in current memory;

M1 - The flow (displacement) field that determines the particle image movement in the synthetic PIV image pair can be saved in current memory 1;

M2 - The flow (displacement) field that determines the particle image movement in the synthetic PIV image pair can be saved in current memory 2.

Edpiv pE 2013 help