Everyone is familiar with and enjoys ice cream. But do we really know how it is produced on an industrial scale? During ice cream’s production process, the starting liquid or semiliquid is placed in the industrial equipment, specifically a heat exchanger, whose internal surface is scraped with the blades of a rotor.
The liquid or semiliquid undergoes abrupt and rapid temperature changes and mechanical shearing that substantially modifies its form, particularly its viscosity. This cream is transformed from a liquid state, somewhat like concentrated milk, to a product whose texture is as rigid as soft Italian ice cream.
- A consistency that evolves over time
This progression results from the progressive formation of a multitude of small ice crystals, transforming so that the fluid flows within the industrial equipment. These modifications, which vary over time and even within the exchanger, also directly influence the temperatures in the mixture. At this point, the product’s viscosity is evolving continually. Yet the interaction mechanisms operating in the transforming fluid, which flows and becomes more and more consistent, remain poorly understood and controlled. Today, they are a technological obstacle for industry, which is seeking to innovate and create new textures and new products, and a brake to the development of new processes.
- A solution that fits in the palm of your hand
Cemagref scientists studying these complex hydrodynamic and thermal processes have developed an experimental tool the size of a 100-ml yogurt cup, making it possible to simulate volumes greater than 500 liters an hour. This simulator can apply the temperature speed changes and mechanical shearing intensities that these products undergo in industrial equipment. With this small prototype, describing and predicting the changes in flow behavior of products are now possible in extreme conditions – at -40°C for example – varying the parameters such as duration, flow speed, pressure, temperature, scraping, and rotor speed. In the laboratory, the simulation of what happens in actual production conditions offers industry new perspectives, making it possible to test a large number of formulations in a short period of time, with obvious cost gains, in the search for new products with hitherto unknown properties.
Another simulator working on a similar principle to study cooking and cooling of milk-based desserts was already patented in 2005, with Danone the industrial partner.An ANR project in the background
Marie Signoret | alfa
Intelligent wheelchairs, predictive prostheses
20.12.2017 | Fraunhofer-Institut für Produktionstechnik und Automatisierung IPA
Jelly with memory – predicting the leveling of com-mercial paints
15.12.2017 | Fraunhofer-Institut für Produktionstechnik und Automatisierung IPA
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
19.02.2018 | Materials Sciences
19.02.2018 | Materials Sciences
19.02.2018 | Life Sciences