Morón, Daniel; Cannon, Ianto; Vela-Martín, Alberto; Avila, Marc: Direct numerical simulations of drop breakup in turbulent flows and decomposition of the turbulence induced straining [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.994057 (dataset in review)
Abstract:
We investigate drop breakup in turbulent flows of two immiscible fluids. We use the decomposition proposed by Vela-Martín & Avila JFM 2021 to separate the turbulent flow in two regions: the outer region (outside the drop and its boundary layer) and the inner region (inside the drop and its boundary layer). Leveraging an extensive database of single-drop simulations, we perform temporal correlation analyses to show that the straining induced by the outer region is statistically independent of the drop dynamics, whereas the inner region responds to drop deformation and, on average, acts as an energy dissipator. Drawing from these observations, we derive a simple analytical model that returns the breakup rate with high accuracy. Our results prove that, to correctly model the deformation and breakup of drops in turbulent flows, one only needs to know the statistical characteristics of the outer field. We show a clear link between the inherent intermittency of turbulent flows and the memory-less breakup of drops with large surface tensions. In this database we include the code used to perform the ensembles of simulations at different Weber numbers and the main results of those simulations. We also include the Matlab codes used to postprocess the results and generate the figures of the related publication. The Weber number indicated in the name of the folders and files (Wef), also used in the code, must be corrected to obtain the actual one. Specifically, We=0.36*Wef. The Weber numbers Wef are writtem as: We_XY or We_XYZ where Wef=X*10 + Y*1 + Z*0.1
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Binary Object | Binary | Morón, Daniel | Numerical simulated | ||
| 2 | Binary Object (File Size) | Binary (Size) | Bytes | Morón, Daniel | Numerical simulated | |
| 3 | Title | Title | Morón, Daniel | Numerical simulated | ||
| 4 | File name | File name | Morón, Daniel | Numerical simulated | ||
| 5 | Description | Description | Morón, Daniel | Numerical simulated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
16 data points
Data
All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.
| 1 Binary | 2 Binary (Size) [Bytes] | 3 Title | 4 File name | 5 Description |
|---|---|---|---|---|
| Code.zip | 178.5 MBytes | Pseudo-spectral code for the calculation of turbulent multiphase flows in a triply periodic box. The code works only on GPUs | Code.zip | Sources of the Fourier pseudospectral DNS code solving the NSE and the CH equations in a triply periodic box. It integrates an initial spherical drop until it detects a breakup event. It saves the instantaneous surface energy of the drops and the magnitude of the outer and inner straining fields. |
| DNS_DATABASE.zip | 2.2 GBytes | Results of the direct numerical simulations, organized according to the Weber number. | DNS_DATABASE.zip | Results of the DNS at different Weber and Re numbers. The data includes the breakup times of the DNS analyzed here and also of the DNS described by Vela-Martín & Avila (Sci. Adv. 2021). It also includes the time dependent interface energy and outer and inner strainning of each simulation. |
| POST_FIGURES.zip | 17.5 MBytes | Matlab routines to postprocess the DNS_DATABASE and generate the figures. | POST_FIGURES.zip | Includes two types of matlab files. Files with the prefix ‘Fig’ are used to generate the figures of the paper using the data saved in the subfolder ‘POST_DATA’. The files with the prefix ‘Gen_’ read the files stored in DNS_DATABASE to compute correlations and auto correlations of the time signals, and the parameters and fits of the model. Please save this folder in the same directory as the uncompressed DNS_DATABASE |
| SnapsDrop2.zip | 509.4 MBytes | Visualization of a drop deformed in a turbulent flow. | SnapsDrop2.zip | Includes png files with the visualization of the interface of a drop as it deforms due to the effect of the turbulent flow. |