Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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Cooling Capacity of Oil-in-Water Emulsion under wet Machining Conditions

2023 , Nabbout, Kaissar , Sommerfeld, Martin , Barth, Enrico , Uhlmann, Eckart , Bock-Marbach, Benjamin , Kuhnert, Jörg

Many industrial machining operations are carried out under wet machining conditions. Modelling and simulating fluid-structure-interactions and conjugate heat transfer are still a challenge nowadays. In this paper, temperature dependent heat transfer coefficients (HTC) h(T) are experimentally estimated for wet machining-like conditions in a jet cooling experiment. The transient temperature is thereby used to solve an Inverse Heat Transfer Problem for HTC function estimation. Determined HTC are applied as input in related jet cooling simulation using the Finite-Pointset-Method (FPM) to validate the modeling approach. Additionally, wet cutting simulations numerically highlight the influence of determined HTC h(T) on turning.

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Fully coupled wet cylindrical turning simulation using the Finite-Pointset-Method

2021 , Uhlmann, Eckart , Barth, Enrico , Quellhorst, Alexander , Seifarth, Tobias , Kuhnert, Jörg , Nabbout, Kaissar , Sommerfeld, Martin

In industrial machining operations, many turning processes are carried out under wet conditions. In contrast, most simulation tools are only suitable for dry cutting processes due to challenges of modeling fluid-structure-interactions (FSI). In this paper, a wet, fully coupled cutting simulation using the Finite-Pointset-Method (FPM) is presented and validated for industrially relevant cylindrical turning. To facilitate the required reduction of the calculation effort, different routines like adaptive numerical discretization are applied. The results indicate different cutting fluid effects like evaporation areas around the chip.

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