A New Free Surface Model for the Dip Coating Process

Réglat, O.; Labrie, R.; Tanguy, Philippe A.

doi:10.1006/jcph.1993.1215

Cited by 16 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This scheme is based on an adaptive nodal displacement procedure. Here, the displacement is an unknown, which is solved for using a weak variational form of the boundary conditions [34,35]. The method is outlined in the following paragraphs.…”

Section: Kinematic Movement Schemementioning

confidence: 99%

Flow simulation in the nip of a rigid forward roll coater

Mmbaga

Hayes

Bertrand

et al. 2005

Int. J. Numer. Meth. Fluids

View full text Add to dashboard Cite

SUMMARYThis paper shows the development of an e cient solution algorithm for the simulation of a forward roll coating ows with free surfaces. The technique is based on the method of successive approximation combined with a method for rapidly ÿnding a good starting point, i.e. a good initial computational domain. Movement of the free surface from the initial to ÿnal positions is demonstrated using both kinematic and normal stress schemes. Adaptive domain decomposition at each pseudo time step is performed with no signiÿcant cost penalty. The ow ÿeld is computed using a ÿnite element solution of the Navier-Stokes equation.The proposed scheme is shown to be exible enough to accommodate di erent scenarios over the practical range of many applications, i.e. capillary numbers in the range of 0.01-300, and a wide range of gap settings and rotational speeds. A close match is found between simulation and experimental meniscus proÿles as well as nip pressure proÿles. Overall the technique is quite robust and is able to simulate a variety of coating ow situations without resorting to over-simpliÿcations.

show abstract

Section: Kinematic Movement Schemementioning

confidence: 99%

Flow simulation in the nip of a rigid forward roll coater

Mmbaga

Hayes

Bertrand

et al. 2005

Int. J. Numer. Meth. Fluids

View full text Add to dashboard Cite

show abstract

“…1͑b͒ and 1͑c͒. More recent numerical studies of the dip-coating process have been presented by Tanguy et al 15 and Reglat et al 16 Schunk et al 17 have extended the model to include mass loss due to solvent evaporation within the framework of a one-and two-phase flow model relevant to sol-gel processing.…”

Section: ͑1͒mentioning

confidence: 99%

“…The majority of experimental and theoretical studies [6][7][8][9][10][11][12][13][14][15][16][17][18] have focused exclusively on chemically homogeneous surfaces. As the number of techniques available for microfabrication and micropatterning grows, there is interest in selectively coating or ''inking'' chemically patterned surfaces for use as chemical microreactors.…”

Section: Introductionmentioning

confidence: 99%

Selective dip-coating of chemically micropatterned surfaces

Darhuber

Troian

Davis

et al. 2000

Journal of Applied Physics

143

129

View full text Add to dashboard Cite

We characterize the selective deposition of liquid microstructures on chemically heterogeneous surfaces by means of dip coating processes. The maximum deposited film thickness depends critically on the speed of withdrawal as well as the pattern size, geometry, and angular orientation. For vertically oriented hydrophilic strips, we derive a hydrodynamic scaling relation for the deposited film thickness which agrees very well with interferometric measurements of dip-coated liquid lines. Due to the lateral confinement of the liquid, our scaling relation differs considerably from the classic Landau-Levich formula for chemically homogeneous surfaces. Dip coating is a simple method for creating large area arrays of liquid microstructures for applications involving chemical analysis and synthesis, biochemical assays, or wet printing of liquid polymer or ink patterns.

show abstract

“…[1][2][3][4][5][6][7][8][9] More recently, as microfabrication has become common and microfluidic applications have increased, the dip coating technique has been used to achieve selective material deposition on micropatterned surfaces. [10][11][12][13] In particular, the experimental investigation of the dip coating of vertical, wetting stripes on a nonwetting planar surface by Darhuber et al 12 has demonstrated that fluid confinement by chemical surface patterning strongly affects the thickness of the entrained liquid film.…”

mentioning

confidence: 99%

Asymptotic analysis of liquid films dip-coated onto chemically micropatterned surfaces

Davis

2005

Physics of Fluids

View full text Add to dashboard Cite

The dip coating of chemically heterogeneous surfaces is a useful technique for attaining selective material deposition. For the case of vertical, wetting stripes surrounded by nonwetting regions, experiments have demonstrated that the thickness of the entrained film on the stripes is significantly different than on homogeneous surfaces because of the lateral confinement of the liquid. In the present work, the asymptotic matching of equations based on lubrication theory is used to determine the film thickness, and necessary restrictions on the capillary and Bond numbers are provided. The predictions are in excellent agreement with the existing experimental data, and the classical Landau–Levich formula for homogeneous surfaces is recovered from the analysis in the limit of very wide stripes.

show abstract

A New Free Surface Model for the Dip Coating Process

Cited by 16 publications

References 0 publications

Flow simulation in the nip of a rigid forward roll coater

Flow simulation in the nip of a rigid forward roll coater

Selective dip-coating of chemically micropatterned surfaces

Asymptotic analysis of liquid films dip-coated onto chemically micropatterned surfaces

Contact Info

Product

Resources

About