IDAC Consultancy Designs

	Modeling moving walls in CFD: Transient simulation with moving meshes Consider the scenario where we want to know the flow field around two objects as they approach each other. Instead of keeping the model as a single domain, we can split the model such that each object is contained within a separate domain. Then in ANSYS CFX using Regions of Specified Motion, we can assign each domain a velocity V1 and V2, while also having them speak to each other via a Domain Interface. Read more
	This ANSYS LS-DYNA analysis demonstrates that a scraper pig, which is used to clean oil and gas pipelines, can negotiate a check valve. The forces generated between the pig and the clapper and between the clapper and the valve body are also evaluated to check the integrity of the assembly. Other analyses also show whether elongated pigs can negotiate wye pieces.
	For high velocity flows, ANSYS LS-DYNA is used to determine the largest impact forces and to investigate whether the pig will be brought to rest. For liquid flows, the mass of the pig is increased to account for the momentum of the fluid column in which the pig sits.
	The top half of the window shows an electro-mechanical beam used as MEMS switch deflected by a differential voltage applied to the transducer elements underneath the switch. The movement is damped by air which flows through the two holes and the sides. The structural and fluidic problem has been solved using fluid-structure interaction (FSI) in ANSYS.
	This is a parametric model of a woven composite fabric. This would be included in an ANSYS Composite Module. It represents a 2x2 unit cell twill fabric, which is the minimum repeatable unit of a fabric, made of fibres woven in two directions embedded in resin. Using these ANSYS parametric models a composite analyst would have the tools to calculate the mechanical properties for different composites unit cell configuration.