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Qualification of helium flow cooling concept

Goal: For a high-tech project, a conduction cooling concept based on helium flow is under consideration. The suitability and performance of this method needs to be verified using numerical analysis and experiential verification to qualify the concept. As a rough starting point for the design of the cooling device the in literature found correlation from Norris and Gnielinski have been used. Challenging technical aspect for modeling of this cooling concept are the high mass flow rate through a small channel with large heat fluxes and uncertainty in the wall roughness parameters.

Noise localization and reduction of respiratory system

Goal: Medical blowers for respiratory systems must meet strict noise production requirements. One of our client’s, a designer of respiratory systems, asked us to localise the source of the noise production. With identification of the problem areas, design changes could be made to meet the noise...

Modeling of complex porous geometries

Goal: Fluid flow through porous media (materials containing pores or voids) is an interesting but also difficult and complex field of study. Fluid flow through a porous medium usually consists of an interpenetrating fluid or gas through a solid labyrinth. This solid labyrinth could for example be a randomly packed bed of beads, rocks, soil or sand or a pack of stacked straws. The concept of porous media is widely encountered or used in the industry; filtration, ventilation, heat transfer, bio-engineering, drainage, oil extraction, drying processes and many more. These porous media are usually part of larger systems. The complex geometries of the porous media themselves are time consuming and almost impossible to simulate accurately in full detail. However, the porous medium can be modelled as a ‘black box’ that induces a pressure drop in the larger system and represents the characteristics of the porous material. In order to replace the porous medium with this ‘black box’, the flow characteristics through the porous medium needs to be determined. An experimental method for the characterization of the porous medium has been developed and validated.

Decrease time to market by elimination lifetime testing

Goal: DEMCON macawi respiratory systems is a total solution provider of Respiration Technology. DEMCON macawi respiratory systems has a high level of knowledge and experience in development and manufacturing of medical ventilator systems. Recently, new high performance OEM blower modules...
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