New experimental results for determining suspension viscosity in a capillary type viscometer from flow velocity profiles measured by Doppler Optical Coherence Tomography are promising.  Non-contact can be very important for certain applications.

Additional general information:

1. Determination of suspension viscosity from the flow velocity profile measured by Doppler Optical Coherence Tomography
2. Experimental study of the multiple scattering effect on the flow velocity profiles measured in Intralipid phantoms by DOCT
3. Doppler OCT imaging of cytoplasm shuttle flow in Physarum polycephalum