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Overcoming and Quantifying ‘Wall Slip’ in Measurements Made on a Rotational Rheometer

When making shear rheological measurements on structured liquids, in particular suspensions, emulsions or foams there is a high probability that the measurement may be affected by a phenomenon known as 'wall slip'. Wall slip generally results from a local depletion of the dispersed phase near the geometry walls, effectively forming a lubrication layer at the surface. As a consequence, bulk rheological properties are no longer being accurately measured leading to an underestimation of the true viscosity. A similar effect can be observed when measuring solid like materials where there is insufficient friction between the sample and the wall to support the applied stress. Please download this free white paper to read more.

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DOWNLOAD WHITEPAPER

Overcoming and Quantifying ‘Wall Slip’ in Measurements Made on a Rotational Rheometer

When making shear rheological measurements on structured liquids, in particular suspensions, emulsions or foams there is a high probability that the measurement may be affected by a phenomenon known as 'wall slip'. Wall slip generally results from a local depletion of the dispersed phase near the geometry walls, effectively forming a lubrication layer at the surface. As a consequence, bulk rheological properties are no longer being accurately measured leading to an underestimation of the true viscosity. A similar effect can be observed when measuring solid like materials where there is insufficient friction between the sample and the wall to support the applied stress. Please download this free white paper to read more.

Download to find out more.

DOWNLOAD

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