The main focus of the research activities at AOT-TP lies on the development and application of various methods for the accurate determination of thermophysical properties of fluids of interest for chemical and energy engineering. This includes both experimental and theoretical approaches where our strategy is to combine the benefits of the different methods. At AOT-TP, experimental research includes the application and development of several conventional and optical methods with the aim of accessing broad ranges of thermodynamic states and minimizing experimental uncertainties. The obtained measurement results are used as a reference database for the validation of theoretically determined thermophysical property data, where the current focus lies on the application and further development of molecular dynamics (MD) simulations for this purpose. One benefit of the theoretical methods is that they can also be applied for thermodynamic states that are difficult to access in experiments. As MD simulations also provide information on molecular interactions between the involved species, they can be employed for finding or corroborating explanations for specific behaviors of experimentally determined property data. By a systematic selection of fluid systems to be studied, experimental and theoretical results are combined to derive structure-property relationships with the aim of developing predictive models for thermophysical properties of arbitrary systems which should be suitable for their application in engineering practice. New research fields have recently been opened in the area of heat transfer. This area is already closely linked to the competences available at AOT-TP owing to the extensive investigation of thermal transport properties and wetting behavior as well as previous activities of institute members in experimental investigation and modelling of condensation heat transfer. Here, current projects focus on the experimental investigation and modeling of condensation heat transfer of hydrocarbon mixtures on tubes and tube bundles, dropwise condensation of fluids with low surface tension, and the heat transfer between the contacting surfaces of tool and workpiece in hot stamping.