Nonisothermal analysis of a couple stress fluid in blade coating process

Mughees, M; Sajid, Muhammad; Ali, Nasir; Shahzad, Hasan

doi:10.1002/pen.25366

Cited by 17 publications

(18 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, it is predicted that the couple stresses may emerge in remarkable magnitudes in alike fluid flows. The non-isothermal couple stress fluid model was analyzed by Mughees et al [38] in a blade coating. It is observed that the increase in couple stress parameter boosts up the load and reduces the coating thickness.…”

Section: Introductionmentioning

confidence: 99%

Study of Slip Effects in Reverse Roll Coating Process Using Non-Isothermal Couple Stress Fluid

et al. 2021

Self Cite

View full text Add to dashboard Cite

The non-isothermal couple stress fluid inside a reverse roll coating geometry is considered. The slip condition is considered at the surfaces of the rolls. To develop the flow equations, the mathematical modelling is performed using conservation of momentum, mass, and energy. The LAT (lubrication approximation theory) is employed to simplify the equations. The closed form solution for velocity, temperature, and pressure gradient is obtained. While the pressure and flow rate are obtained numerically. The impact of involved parameters on important physical quantities such as temperature, pressure, and pressure gradient are elaborated through graphs and in tabular form. The pressure and pressure gradient decreases for variation of the couple stress parameter and velocity ratio parameter K. While the variation of the slip parameter increases the pressure and pressure gradient inside the flow geometry. Additionally, flow rate decreases for the variation of the slip parameter as fluid starts moving rapidly along the roller surface. The most important physical quantity which is responsible for maintaining the quality of the coating and thickness is flow rate. For variation of both the couple stress parameter and the slip parameter, the flow rate decreases compared to the Newtonian case, consequently the coating thickness decreases for the variation of the discussed parameter.

show abstract

Section: Introductionmentioning

confidence: 99%

Study of Slip Effects in Reverse Roll Coating Process Using Non-Isothermal Couple Stress Fluid

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hwang 26 studied power-law fluid to analyze the blade coating process and approximate solutions were developed using a simple blade coater. Recently Mughees et al 27 studied blade coating phenomenon using a Couple stress fluid and presented its non-isothermal analysis by simplifying the governing equations by applying lubrication approximation theory. The obtained results were presented by graphs and tables to highlight important physical quantities for engineers including pressure, velocity, load, pressure gradient, and thickness.…”

Section: Introductionmentioning

confidence: 99%

An exact solution for blade coating of a second-grade fluid on a porous substrate

Mughees

Sajid

Shahzad

et al. 2021

Journal of Plastic Film & Sheeting

Self Cite

View full text Add to dashboard Cite

This study explores the blade coating process with a simple fixed blade for a second-grade fluid over a moving porous substrate. The article investigates both plane and exponential blade coating. The analysis simplifies the governing equations via lubrication approximation theory by assuming that blade length is much larger than the coating layer thickness. Suitable scales normalize the governing equations. The expressions for pressure gradient and velocity are analytically obtained whereas pressure is attained using a so-called “shooting method” numerical technique. How the Reynolds number [Formula: see text], suction velocity [Formula: see text] and non-Newtonian second-grade parameter [Formula: see text] affect the velocity, pressure gradient, pressure, coating layer thickness and load on the blade are observed and displayed graphically and as tables. Interesting engineering quantities like velocity, pressure gradient and pressure are highlighted in graphical form whereas load and thickness are presented as tables. It is observed that the pressure gradient, pressure, velocity, load and thickness decrease as the parameters [Formula: see text] and [Formula: see text] and [Formula: see text] icrease for the cases of both plane and exponential coaters while all these physical quantities are observed to increase when the parameter [Formula: see text] increases. The most important physical quantity is the load for it is responsible in maintaining the coating quality and thickness. Moreover, it is perceived that the load decreases as the Reynolds number [Formula: see text] and [Formula: see text] increases get accelerated and it increases when parameter [Formula: see text] is increased.

show abstract

“…Mughees et al 20 developed the mathematical model for non-isothermal couple stress fluid for blade coating process. They also used LAT to simplify the governing equations.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling of Johnson-Segalman fluid in blade coating process

Kanwal

Wang

Shahzad

et al. 2021

Journal of Plastic Film & Sheeting

Self Cite

View full text Add to dashboard Cite

This article deals with the blade coating process for Johnson-Segalman (JS) fluid using plane coater. Flow equations are simplified with the Lubrication approximation theory (LAT). The equations are normalized using suitable scales. Reduced equations are solved numerically using the shooting technique. Also, for small Weissenberg numbers, a perturbation solution is obtained. How Weissenberg number and slip parameter influence the pressure gradient, velocity, pressure, load, and thickness are expressed graphically and via table. In the present work, load on the blade is crucial as it controls the thickness quality. One observes that an increased Weissenberg number decreases load, while the coating thickness increases when compared to the viscous case.

show abstract

Nonisothermal analysis of a couple stress fluid in blade coating process

Cited by 17 publications

References 22 publications

Study of Slip Effects in Reverse Roll Coating Process Using Non-Isothermal Couple Stress Fluid

Study of Slip Effects in Reverse Roll Coating Process Using Non-Isothermal Couple Stress Fluid

An exact solution for blade coating of a second-grade fluid on a porous substrate

Mathematical modeling of Johnson-Segalman fluid in blade coating process

Contact Info

Product

Resources

About