Herbert Sixta

10.5937/jaes12-5021 = Processing plate-plate immobilization data of MNFC furnishes

Appropriate regularization algorithm is proposed for choosing the regularization parameter based on nosy immobilizationxa0 viscosity data. Complex fluids as nanocelluose based high consistency suspensions have very complex rheological behavior. This paper describes Tikhonov regularization procedure for reducing the noise from immobilization rheograms of nanocellulose based furnishes, performed on immobilization cell at xa0MCRxa0xa0 300 rheometer. Noise observed in immobilization rheograms can make evaluation of data very complicated and lead to wrong interpretation of rheological behavior observed. They are xa0xa0related to the change of consistency accompanied with rearrangement of the particles during shear induced dewatering accompanied with wall slip and boundary effects typicalxa0 for gel likexa0 nanocellulose suspensions. Hereby we propose a model with regularization parameters suitable for applying to parallel disk data forxa0 flocculatedxa0 gel likexa0 high consistency xa0suspensions while consistency increasing mode upon shearing .