﻿## Readme ###########################################################



The results represent the experimental data (corresponding to Exp Fluids (2014) 55:1816 DOI 10.1007/s00348-014-1816-3) of the velocity, static pressure difference, and vessel diameter measurements in the inlet and outlet cross sections as well as several vessel cross sections. The inlet cross section is referred to by CS 1, the vessel cross section by CS 2, and the outlet cross section by CS 5. Since cross sections CS 1 and CS 5 represent the inlet and outlet quantities, the results at these cross sections are considered as boundary conditions. The volume flux in CS 1 is determined by the piston pump whereas CS 5 is facing an open end. That is, the volume flux of the vessel cross esctions is a result of the fluid-structure interaction.

The expermintal data is provided as matlab file for each case and position, eg. ’ExpData-CSection2Case2.mat’. The file contains besides others the 3D-velocity, pressure difference, and unsteady diameter of the respective cross-section. The data of each set covers 1 complete oscillation. With each data set a phase array is provided which contains the phase angle corresponding the time-steps of the data set. Since all data sets are synchronized this superfluous. Diameter and pressure data
set are 1D-arrays. The velocity data sets are 3D and contain the velocity distribution of each time step. The values of the spatial coordinates x,y,z are given in X and Y.



kinematic viscosity nu = 5.7 mm²/s

density		    rho = 1.14 kg/l



More details are given in Exp Fluids (2014) 55:1816 DOI 10.1007/s00348-014-1816-3



## Variables ##

Variable	Name			Unit		Variable Dimension (matlab)

DP	static pressure difference	[mbar]		
2-D
R	unsteady radius			[m]		2-D
Ctr	unsteady center position	[m]		3-D : (step,direction[x/y/(z)])

U	velocity distribution		[m/s]		4-D : (velocity component[u/v/w],x,y,step)

X	x coordinate values		[m]		2-D

Y 	y coordinate values		[m]		2-D

phi	phase angle			[°]		2-D	

##

Example ##
To display the velocity distribution of CS 2 at time-step 'tstep' of case 2:

load ExpData-CSection2Case2.mat

contourf(X,Y,squeeze(U(3,:,:,tstep)),30), hold all;

quiver(X,Y,squeeze(U(1,:,:,tstep)),squeeze(U(2,:,:,tstep)),2,'k','filled')





Results for the straight elastic vessel can be found at:
: http://www.aia.rwth-aachen.de/data/straight-elastic-vessel-2014