351 : 3D shear jet flow/Reference




No. 351 Unit
Image Size 256 x 256 pixel
Area 4 x 4 cm
Laser IlluminationVolumemm
Interval 0.005 sec
Max. Velocity 10 pixel/interval
Max. out-of-plane Velocity 15 %

DATA DOWNLOAD

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PIV Three-dimensional Standard Images    #351


Generator:  K. Okamoto  (Univ. Tokyo)
Program:    ddr.c
Date:       March 27, 1998


Parameters:
 Target Flow Field:  Jet impinging on the Wall
 Reynolds Number:    3000

                      2cm
         ------------|   |------------
                       |  15cm/s
                       V

                    XXX
                    XXX

         -----------------------------

 Number of Particles inserted in the field       6000 Particles
 Number of Particles visualized in one Image     2000 Particles (average)

 Diameter of Particles      5 pixel (average)
                            2       (standard deviation)
                            1       (minimum)

 Maximum Velocity                 12 cm/s
 Target Flow field                2cm x 2cm x 2cm
 Time Interval between images     5 msec

 Laser Illumination               Cylindrical from bottom (radius = 5cm)
                                     [almost whole illumination]

 Water refractive index           1.33
 Wall distance                    3 cm from center
      orientation                 parallel to #1 camera image

 Camera positions
    #0  Distance from center      20 cm
        angle to X axis          -30 degree

    #1  Distance from center      20 cm
        angle to X axis            0 degree

    #2  Distance from center      20 cm
        angle to X axis           30 degree

  No orientation variations were considered.

                                    ^ y
                                    |
                                    |/
                        ------------+---------------> x
                                   /|
                                  / |
                                 /
                                /z
                               L

            TOP VIEW
                                  |
                                 O| Particles
                    --------------+-----------------> x-axis
                                 /|
                                / |
                               /  |        n=1.33(water)
                    ==============|===================== WALL
                             /    |        n=1.00(air)
                            /theta|
                           / (-30)|(30)
                          /       |
                        #0        |        #2 camera
                     camera       |
                                 #1 camera
                                  |
                                  | z-axis
                                  V 


Image Files (imX???.raw)

  X:    camera# (0-2)
  ???:  serial# (000-144)   Total 720msec

  Image size  256x256 pixel (8bit:256)



 Calibration File (imX999.raw)
   Particles (Total 27 particles)
     x = -0.8, 0, 0.8 cm
     y = -0.8, 0, 0.8 cm
     z = -0.8, 0, 0.8 cm



Vector files  (vec???.dat)

   x      y      z        u         v         w
 -0.80  -0.80  -0.80   0.17542  -4.51977   0.01204
 -0.80  -0.80  -0.60  -0.18245  -4.11870  -0.26516
 -0.80  -0.80  -0.40  -0.78761  -3.38484  -0.41633

   unit: x,y,z  [cm]
         u,v,w  [cm/s]


Particle Files  (ptc???.dat)
                             #1 camera     #2 camera     #3 camera  intensity
   ID    x      y      z      X      Y      X      Y      X      Y
    4 -0.301  0.584  0.893 147.61  64.91  95.55  65.10  53.07  65.92 208.18
    6 -0.898  1.266 -0.258   0.00   0.00   0.00   0.00  46.22   0.15 208.69
    8  1.178  0.886  0.149 249.88  38.07 251.10  35.42 219.99  32.46 191.52
    9  0.720 -1.242 -0.530 183.76 252.88 201.24 254.40   0.00   0.00 211.21

   unit: x,y,z  [cm]
         X,Y    [pixel]

   The particle ID is unique number, therefore, the same particle could
   be easily tracked with checking the ID for serial particle files.


If you have any questions, please contact Dr. Okamoto
(okamoto@tokai.t.u-tokyo.ac.jp)