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Author:

Shahzad, Hasan (Shahzad, Hasan.) | Wang, Xinhua (Wang, Xinhua.) (Scholars:王新华) | Hafeez, Muhammad Bilal (Hafeez, Muhammad Bilal.) | Shah, Zahir (Shah, Zahir.) | Alshehri, Ahmed Mohammed (Alshehri, Ahmed Mohammed.)

Indexed by:

Scopus SCIE

Abstract:

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.

Keyword:

non-isothermal flow slip condition analytic solution heat transfer reverse roll coating couple stress fluid lubrication approximation theory (LAT) shooting technique

Author Community:

  • [ 1 ] [Shahzad, Hasan]Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Xinhua]Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 3 ] [Hafeez, Muhammad Bilal]Gdansk Univ Technol, Fac Mech Engn & Ship Technol, Dept Mech Engn, Narutowicza 11-12, PL-80233 Gdansk, Poland
  • [ 4 ] [Shah, Zahir]Univ Lakki Marwat, Dept Math Sci, Lakki Marwat 28420, Pakistan
  • [ 5 ] [Alshehri, Ahmed Mohammed]King Abdulaziz Univ, Fac Sci, Dept Math, Jeddah 21589, Saudi Arabia

Reprint Author's Address:

  • [Shahzad, Hasan]Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China

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Source :

COATINGS

Year: 2021

Issue: 10

Volume: 11

3 . 4 0 0

JCR@2022

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count: 17

SCOPUS Cited Count: 17

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 7

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