Fluid flows, Thermal engineering

the cooling process of chocolate pastilles.

In a pastillator, molten droplets are deposited on a moving and cooled steel belt. These droplets have a constant size and are evenly spaced. The droplets cool down to solid pastilles on the belt. The aim of this simulation was to identify critical parameters in this cooling process. A numerical sensitivity analysis was performed for a pastillator in ANSYS Fluent and we were able to identify the most important parameter: the temperature of the belt.

Cooling down hot melted chocolate

our approach.

Performing experimental research can be very time consuming and resourceful. Especially when one wants to perform a sensitivity analysis which requires many experiments with slightly deviating operational parameters. We performed a sensitivity analysis for a steel belt cooler. Several cases were simulated, with different values for several parameters: the velocity of the air moving over the belt, the initial temperature of the air moving over the belt and the wall temperature of the moving belt. The average temperature of a pastille just before it left the belt, was evaluated and used to compare the different scenarios.


Geoffrey Havermans

+31 (0)88 - 115 20 00

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“cooling down hot melted chocolate”

Demcon multiphysics.

Demcon multiphysics is an engineering agency with high-end expertise in the area of heat transfer, fluid dynamics, structural mechanics, acoustics, electromagnetism and nuclear physics. We support clients from a wide variety of market sectors and help them achieve their goals in research and development with deep physical insights.

We combine fundamental physical knowledge from an analytical approach with Computer Aided Engineering (CAE) simulations tools from ANSYS, MATHWORKS, COMSOL, STAR-CCM+ and FLUKA to setup, execute, analyze and evaluate numerical simulations. The use of Computational Fluid Dynamics (CFD), Finite Element Analysis (FEM / FEA), Lumped Element Modelling (LEM), Computational Electromagnetics (CEM) and Monte Carlo simulations enables us to make a virtual prototype of your design. With these techniques we can simulate the fluid and gas flows, energy exchange, heat and mass transfer, stresses, strains and vibrations in structures and the interaction of electromagnetic fields with other physical aspects like heat generation. Simulation-driven product development increases the development efficiency and reduces the product development time. Our services can therefore fully support you in the designing phase, from idea up to prototype, from prototype to final design.