Case Studies

Simulation of Heat Transfer From Impinging Turbulent Jets

Arrays of impinging fluid jets are an effective design solution for applications requiring large heat transfer rates. This case study demonstrates the ability of computational fluid dynamics (CFD) to predict heat transfer coefficient distributions and guide design choices to improve cooling uniformity.

Simulation Verification of PLLA Stent Implantation

Regulatory agencies such as the US Food and Drug Administration (FDA) require medical device manufacturers to follow rigorous simulation verification procedures to assess credibility of numerical simulations used to support submissions. In this case study, we simulate crimping of a Poly L-lactic Acid (PLLA) stent in the implantation process and demonstrate numerical solution verification.

Small-Scale Friction Measurement

Medical devices, combination products, consumer products, and manufacturing processes often include components that slide past each other. These products and processes can fail when the friction forces between the surfaces are too high, due to surface roughness, lubrication, materials, or environmental conditions. Here Veryst introduces a specialized fixture to measure the friction between a small metal wire and three polymer materials, to select a backup supplier for dual sourcing that would maintain low friction in a medical device.

Soccer Ball Impact Simulation

Some of the most sensational goals in soccer history came from free-kicks and long shots. (Remember Roberto Carlos’ famous 1998 free-kick?) Veryst investigated the effect of friction between ball and boot, the ball’s internal pressure, and ball materials on the ball’s rotational velocity to understand ball/boot interaction.

Soft Fluidic Grippers

How does a soft fluidic gripper perform when inflated and how does it interact with its environment? This is a challenging, yet essential, question to the design and integration of soft robotics in the industry. Veryst Engineering developed a finite deformation Abaqus model to study the behavior, performance, and stability of soft fluidic grippers, providing insight to the design and assessment of soft robots and devices.

Strength of Additively Manufactured Parts

Veryst can predict the ultimate strength and failure modes of design concepts generated using topology optimization and produced using additive manufacturing. We use advanced finite element analysis (FEA) that accounts for the nonlinear behavior of the material being used to make the part.

Tank Sloshing Simulation

During sloshing, liquid exerts a dynamic force on the surrounding vessel, which may cause leakage or damage to the vessel or its supporting structure. We used a mesh-free smoothed particle hydrodynamics (SPH) method to predict liquid sloshing and its effect on the deformation and stresses in a vessel.

Tempered and Plate Glass Fracture

Tempered and plate glass are manufactured to produce very different fracture patterns when they break. Veryst can use this information to identify installed glass products and discuss the implications of their use.

Tensile Testing of Nitinol Wires

Shape memory alloys, like nickel titanium alloy (nitinol), are common in medical device applications. Nitinol is often used in fine wire form and can be difficult to test. Veryst has developed methods to test fine nitinol wires in uniaxial tension at different temperatures to obtain a stress-strain curve.

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