Non-Newtonian Fluids

Non-Newtonian fluids such as blood, ketchup, toothpaste, shampoo, paint and lotion have complex rheology with varying viscosities. FLOW-3D models such fluids with non-Newtonian viscosities that are strain and/or temperature dependent. Shear and temperature dependent viscosities are described with either Carreau, the power law functions or simply through a tabular input. Time-dependent or thixotropic behavior, characteristic of some polymers, ceramic and semi-solid metals, can also be simulated.

Hand Lotion Pump

Hand lotion pumps are often associated with several design issues. It is important for the pump to work effectively without trapping air voids and generate a continuous stream of lotion. A good design requires less effort and would ideally direct the lotion to a desired place. FLOW-3D‘s Moving Object model is used to simulate the nozzle being pushed down, thereby pressurizing the lotion in the reservoir. The pressure in the lotion and the force required to extract lotion can be studied. Several design variables can easily analyzed within the same stationary structured mesh.

FLOW-3D’s TruVOF method accurately captures the pulsating lotion as the ball regulates the frequency of dispensing lotion.