CPC G01N 11/08 (2013.01) [G01N 2011/0013 (2013.01); G01N 2011/008 (2013.01)] | 17 Claims |
1. A method for determining a rheological property of a fluid, which comprises the steps of:
conveying the fluid with a constant volume flow rate through a nozzle;
depositing a fluid strand thereby generated on a substrate while causing a relative movement to take place between the nozzle and the substrate at a forward feed velocity value;
optically measuring a contour of the fluid strand between the nozzle and the substrate; and
calculating a strain rate-dependent extensional viscosity as the rheological property derived from the constant volume flow rate, the forward feed velocity value and the contour of the fluid strand.
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