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Hot Embossing by Matthias Worgull

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6.1.1. Squeezing Flow of a Newtonian Fluid

The approach is based on two flat, circular discs with the radius R and a Newtonian fluid with the viscosity η in between. The gap between the two discs is 2h0. To the circular disks, a force of F is applied (Fig. 6.1).

Figure 6.1. A Newtonian fluid with the viscosity η is compressed by the force F acting on circular discs.

The force F exerts a pressure on the fluid, which induces compressive stresses in the fluid. These stresses cause a radial flow of the fluid from the disc center outwards to its circumference. The flow is based on a pressure difference dp. Under the influence of the force dF, the ...

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