Scientific Data in Subproject A7


General Information on the Datasets

The data are an excerpt of the numerical investigation in Subproject A7 concerning the shattering phenomenon that occurs in binary droplet collisions at high Weber numbers. The data are helpful for gaining insights into the ejection of satellite droplets.  Especially, the stochastic effect is also considered through repeating the simulation with different noises in the initial velocity field. More details are found under:


N We Re D0 (mm) Initial Domain (mm3) Initial Grid
Symmetry Plane
1 442.3 6207.3 1.21 5x5x1.25 512x512x128 1
2 805.2 6370.0 0.7 3x3x0.75 512x512x128 1
3 1520 8750.0 0.7 1.5x1.5x0.75 1024x1024x512 3


We is the Weber number defined as We=ρU_r^2 D_0/σ and Re is the Reynolds number defined as =ρU_r D_0/η . The domain is changed one time in the first two cases due to the use of the Domain Adjustment Technique. In the simulations, one or ¼ water droplet collides with a symmetry plane in air surroundings. The material Parameters are listed in the following:

Water Droplet     
  Dynamic Viscosity 1.0 x 10-3 N s m-2
  Density 1000 kg m-3
  Dynamic Viscosity 1.8 x 10-5 N s m-2
  Density 1.2 kg m-3
Surface Tension 72.0 N m-1


Data visualization
The data are stored in binary format with double-precision (8-byte). The data are visualized by invoking the Meta data stored in *.xmf. The data structure is found in *.xmf.


If you have an account the raw data can be downloaded here.

Sunday, August 25, 2019