In this work, the flow behavior of sandwich foldcores and their influence on the fluidic parameters such as pressure drop are investigated. The subjects of the investigation are three different foldcore geometries, which are analyzed with the ICFD solver from LSDyna. The results are then examined with results from numerical simulations using OpenFoam as well as experiments in the water channel.
A Clutch is a mechanical link used to transmit torque from engine to transmission and typically rotates at very high RPMs. The clutches continuously engage with friction pads to transmit power for motion and only disengage when a gear ratio change is required. During this process of engaging and disengaging the clutch goes from stationary to moving instantaneously. A combination of friction pads and disks are used to transmit the power. There is a significant increase in temperature due to friction between the pads and plate at transition and during rotation. This temperature increase leads to thermal expansion of parts and can cause uneven shape changes. The deformation leads to increase in frictional energy and eventual rise in heat generation. Friction and temperature along with pressure applied during the high rpm rotation leads to high probability of failure at the leading edge of the pads. Uneven distribution of heat can cause failure in the friction pads. To alleviate the effect of temperature, lubricating oil is injected via channels in the friction pad.
Cooling jet flows are commonly encountered in many industrial applications where fast and strong heat dissipation is required such as in pistons, gears, electrical engines and so forth. With the rapid growth and acceptance of simulation as a companion tool intervening directly in the design process, there is a need to provide fast and robust numerical solutions that can provide information on flow patterns and cooling efficiency.
This paper will discuss some of the new additions that will be part in the R13.0 release for the Incompressible CFD (ICFD) solver in LS-DYNA. The paper will also cover some of the highlights of R12. In the past year there has been an increased interest in the model of problems that involve the simulation of free surfaces, Fluid Structure Interaction (FSI) and porous media flow. These topics will be discussed, and the new features/improvements will be presented. The road map is a collection of feature requests from LS-DYNA distributors, Ansys ACE organization, academic collaborators and customers. Based on this a brief discussion the top topics will be presented including immersed interface techniques, gap closure models, multi-species transport and tighter integration with Ansys tools.
There is a great interest in the fluid-structure interactions (FSI) of flow mechanics around valves in the heart or in mechanical parts. The capability to allow flow blockage due to the valve closure is very important.
Numerical investigation of the flow through fold-cores with LSDyna ICFD Solver