Douglas W. Bousfield Professor Director of the Paper Surface Science Program Graduate Coordinator University of Maine Pulp and Paper Foundation Faculty Fellow   • B.S. Montana State University, 1981 • M.S. Oregon State University, 1983 • Ph.D. University of California - Berkeley, 1986   Phone: 207-581-2300 Fax: 207-581-2323 Email: bousfld@maine.edu

Research Interests

Fluid mechanics • rheology • numerical methods • coating processes

Current Research

My research is directed at the application of fluid mechanics and rheology to industrial processes such as paper coating, paper web formation, printing, bubble coalescence, filtration, flotation, and polymeric film coating. Emphasis is placed on the development of simplified models to represent specific processes and the verification of these models with experiments. A number of novel experimental tools have been built to show the important mechanisms of various processes. Several unique areas have emerged in this effort understanding these processes.

Particle Motion Modeling

Suspensions are involved in many areas of coating and printing. The need to understand the rheological properties and the final properties of the coating layer has caused a new effort in modeling of particles motion in a flow field. The colloidal forces as well as the hydrodynamic forces are included in the model.

Coating Flows on Porous Webs

When suspensions and polymer solutions are contacted with a porous substrate, capillary and other external forces can cause the fluid phase to penetrate into the substrate. Unique methods have been developed to describe the coating flow field accounting for this penetration.

Thin Film Dynamics

Thin liquid films are important in a number of areas. Unique methods to describe the dewetting and rupture of thin films have been generated. Non-Newtonian rheology and hydrophobic attractive forces have been included in recent models.

Selected Publications

Book Chapter

D.W. Bousfield and A. Co, “Paper Coating Rheology”, Advances in Rheology, D.A. Siginer editor, pp. 827-842, John Wiley & Sons, Inc. New York, 1999.

Selected Papers

Bousfield D.W. and G. Karles, “Penetration into three-dimensional porous structures”, J. Colloid and Inter. Sci., 270:396-405 (2004).

Al-Turaif, H. and D.W. Bousfield, “The influence of substrate absorbency on surface energy of coatings”, Prog. in Organic Coatings, 49:62-69 (2003).

Bitla, S., C.P. Tripp, and D.W. Bousfield, “A raman spectroscopic study of migration in paper coatings”, J. Pulp and Paper Sci., 29(11): 382-385 (2003).

Paradis, M.A., J.M. Genco, D.W. Bousfield, J.C. Hassler, V. Wildfong, “Measurement of drainage under conditions of known shear rate”, J. Pulp and Paper Sci., 29(12):395-400 (2003).

Xiang Y, D.W. Bousfield, P.C. Hayes, and J. Kettle, “Effect of latex swelling on ink setting on coated paper”, 1: 13-25, J. of Graphic Tech., (2003).

He P., S. Bitla, D.W. Bousfield, and C.P. Tripp, “Raman spectroscopic analysis of paper coatings”, Applied Spect., 56(9): 115-1121 (2002).

Y. Xiang, D.W. Bousfield, J. Hassler, P. Coleman, and A. Osgood, “Measurement of local variation of ink tack dynamics”, J. Pulp and Paper Sci., 25(9):326-330, 1999.

A. Romagnoli and D.W. Bousfield, “Particle motion modeling of oblate spheroids in complex flow geometries”, TAPPI J., 82(11):135-140, 1999.

M.O. Toivakka and D.W. Bousfield, “Leveling of coating suspensions”, J. Pulp and Paper Sci., 25(5):183-188, 1999.

J.A. Roper, P. Salminen, R. Urscheler, and D.W. Bousfield, “Studies of orange peel formation in high-speed film coating”, TAPPI J., 82(1):231-238 , 1999.

R.R. Bilodeau, and D.W. Bousfield, "Shear-Thinning Predictions from Particle Motion Modeling", J. Rheol., 42(4):743-764, 1998.

D.W. Bousfield, M. Wikstrom, and M. Rigdahl, “Roll Deformation During Blade Coating”, TAPPI J., 81(5):207-212, 1998.

D. Desjumaux, D.W. Bousfield, T.P. Glatter, D.W. Donigian, J.N. Ishley, and K.J. Wise “Influence of Pigment Size on Wet Ink Gloss Development”, J. Pulp and Paper Sci., 24(5):150-155, 1998.

Arslan, K., D.W. Bousfield, and J.M. Genco, “Effect of Shear Forces on Fine Particle Retention”, TAPPI J., 80(1):254-261 (1997).

Bousfield, D.W., P. Isaksson, and M. Rigdahl, “Modeling of Particle Motion at the Exit of a Blade Coater”, J. Pulp and Paper Sci., 23(6):J293-J297 (1997).

Isaksson, P., M. Rigdahl, and D.W. Bousfield, “Cavitation Predictions During Blade Coatings”, Ind. Eng. Chem. Res. Fund., 36(7):2834-2840 (1997).

Glatter, T. and D.W. Bousfield, “Print Gloss Development on a Model Substrate”, TAPPI J., 80(7):125-132 (1997).

Eksi, G. and D.W. Bousfield, “Modeling of Coating Structure Development”, TAPPI J., 80(2):125-135 (1997).

Paulsen, F.G., R. Pan, D.W. Bousfield, E.V. Thompson, "The Dynamics of Bubble/Particle Attachment and the Application of Two Disjoining Film Rupture Models To Flotation. Part I. Nondraining Mode," J. Colloid and Interf. Sci., Accepted for publication.

Toivakka, M., E. Eklund, and D.W. Bousfield, "Prediction of Suspension Viscoelasticity through Particle Motion Modeling," J. Non-Newt. Fluid Mech., 56, 49-64 (1995).

Scheller, B.L. and D.W. Bousfield, "Newtonian Drop Impact with a Solid Surface," AIChE J., 41(6), 1357-1367 (1995).

Pan R., F.G. Paulsen, D.A. Johnson, D.W. Bousfield, and E.V. Thompson, "Statistisches Gesamt-Modell fur das Flotationsdeinking: Modellvoraussagen des Flotationswirkungsgrades und experimentelle Bestatingung," Wochenblatt fur Papierfabrikation, 123(20), 920-925 (1995).