TY - JOUR
T1 - Effect of pressure-dependent viscosity on the exiting sheet thickness in the calendering of Newtonian fluids
AU - Hernández, A.
AU - Arcos, J.
AU - Méndez, F.
AU - Bautista, O.
N1 - Funding Information:
This work has been supported by research grants 20120706 and 20121287 of SIP-IPN at Mexico .
PY - 2013/6/1
Y1 - 2013/6/1
N2 - An analysis of calendering for an incompressible Newtonian fluid flow, with pressure-dependent viscosity is studied theoretically under assumptions of isothermal conditions. We predict the influence of pressure-dependent viscosity on the exiting sheet thickness of the sheet of fluid from the gap. The dimensionless mass and momentum balance equations, which are based on lubrication theory, were solved for the velocity and pressure fields by using perturbation techniques, where the exiting sheet thickness represents an eigenvalue of the mathematical problem. When the above variables were obtained, the dimensionless exiting sheet thickness was determined by considering the influence of the pressure variations in the calendering process. Moreover, quantities of engineering interest are also calculated, which include the cylinder-separating force and power required to drive both cylinders in terms of the geometrical and kinematical parameters of the system. The results show that the inclusion of pressure-dependent viscosity effect increases the leave-off distance and consequently the dimensionless exiting sheet thickness in comparison with the case of pressure-independent viscosity.
AB - An analysis of calendering for an incompressible Newtonian fluid flow, with pressure-dependent viscosity is studied theoretically under assumptions of isothermal conditions. We predict the influence of pressure-dependent viscosity on the exiting sheet thickness of the sheet of fluid from the gap. The dimensionless mass and momentum balance equations, which are based on lubrication theory, were solved for the velocity and pressure fields by using perturbation techniques, where the exiting sheet thickness represents an eigenvalue of the mathematical problem. When the above variables were obtained, the dimensionless exiting sheet thickness was determined by considering the influence of the pressure variations in the calendering process. Moreover, quantities of engineering interest are also calculated, which include the cylinder-separating force and power required to drive both cylinders in terms of the geometrical and kinematical parameters of the system. The results show that the inclusion of pressure-dependent viscosity effect increases the leave-off distance and consequently the dimensionless exiting sheet thickness in comparison with the case of pressure-independent viscosity.
KW - Calendering
KW - Lubrication theory
KW - Pressure-dependent viscosity
KW - Sheet thickness
UR - http://www.scopus.com/inward/record.url?scp=84878168651&partnerID=8YFLogxK
U2 - 10.1016/j.apm.2013.02.010
DO - 10.1016/j.apm.2013.02.010
M3 - Artículo
SN - 0307-904X
VL - 37
SP - 6952
EP - 6963
JO - Applied Mathematical Modelling
JF - Applied Mathematical Modelling
IS - 10-11
ER -