Abstract
The behaviour of droplets consisting of two different Praestol®; solutions impacting on a dry solid wall was studied. They show a similar but not identical spreading behaviour. This difference is due to the shear-thinning characteristics of Praetol®; 2540 where lower viscosities are reached for smaller shear rates compared to Praetol®; 2500. The results may serve as a basis for future comparisons with Newtonian liquids. The in-house code FS3D was used which is based on a Volume of Fluid method. The parallel performance of the code was analysed by studying the strong and weak scaling behaviour on the Cray CX40 system at the HLRS Stuttgart. Non-ideal speed-up was found which is mostly due to the high communication load in the multigrid solver. A new solver will overcome these limitations in the future.
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Acknowledgements
The authors kindly acknowledge the High Performance Computing Center Stuttgart (HLRS) for support and supply of computational time on the Cray XC40 platform under the Grant No. FS3D/11142 and the financial support by the Deutsche Forschungsgemeinschaft (DFG) for the Collaborative Research Center SFB-TRR75.
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Reitzle, M., Roth, N., Weigand, B. (2016). Numerical Study of the Impact of Praestol® Droplets on Solid Walls. In: Nagel, W.E., Kröner, D.H., Resch, M.M. (eds) High Performance Computing in Science and Engineering ´16. Springer, Cham. https://doi.org/10.1007/978-3-319-47066-5_25
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DOI: https://doi.org/10.1007/978-3-319-47066-5_25
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