Side wall effects in thin gravity-driven film flow – steady and draining flow

2011 ◽  
Vol 23 (6) ◽  
pp. 062107 ◽  
Author(s):  
A. Haas ◽  
T. Pollak ◽  
N. Aksel
Keyword(s):  
Film Flow ◽  
Side Wall ◽  
Wall Effects ◽  
Gravity Driven

Numerical investigation of side-wall effects on the seakeeping performance of a ship advancing in waves

2021 ◽  
Vol 239 ◽  
pp. 109797
Author(s):  
Chaobang Yao ◽  
Jianghao Huang ◽  
Xiaoshuai Sun ◽  
Jiawei Yu ◽  
Dakui Feng
Keyword(s):  
Numerical Investigation ◽  
Side Wall ◽  
Wall Effects ◽  
Seakeeping Performance

scholarly journals Explicit Solutions of a Gravity-Induced Film Flow along a Convectively Heated Vertical Wall

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Ammarah Raees ◽  
Hang Xu
Keyword(s):  
Film Flow ◽  
Vertical Wall ◽  
Boussinesq Approximation ◽  
Convective Boundary Condition ◽  
Convective Boundary ◽  
Similarity Transformations ◽  
Reduced Equations ◽  
Homotopy Analysis ◽  
Gravity Driven ◽  
The Mathematical Model

The gravity-driven film flow has been analyzed along a vertical wall subjected to a convective boundary condition. The Boussinesq approximation is applied to simplify the buoyancy term, and similarity transformations are used on the mathematical model of the problem under consideration, to obtain a set of coupled ordinary differential equations. Then the reduced equations are solved explicitly by using homotopy analysis method (HAM). The resulting solutions are investigated for heat transfer effects on velocity and temperature profiles.

Separating and Reattaching Flow Structure in a Suddenly Expanding Rectangular Duct

1995 ◽  
Vol 117 (1) ◽  
pp. 17-23 ◽  
Author(s):  
G. Papadopoulos ◽  
M. V. O¨tu¨gen
Keyword(s):  
Aspect Ratio ◽  
Flow Structure ◽  
Three Dimensional ◽  
Side Wall ◽  
Stream Velocity ◽  
Rectangular Duct ◽  
Mean Flow ◽  
Wall Effects ◽  
Velocity Measurements ◽  
Aspect Ratios

The incompressible turbulent flow over a backward-facing step in a rectangular duct was investigated experimentally. The side wall effects on the core flow were determined by varying the aspect ratio (defined as the step span-to-height ratio) from 1 to 28. The Reynolds number, based on the step height and the oncoming free-stream velocity, was 26,500. Detailed velocity measurements were made, including the turbulent stresses, in a region which extended past the flow reattachment zone. Wall static pressure was also measured on both the step and flat walls. In addition, surface visualizations were obtained on all four walls surrounding the separated flow to supplement near-wall velocity measurements. The results show that the aspect ratio has an influence on both the velocity and wall pressure even for relatively large aspect ratios. For example, in the redevelopment region downstream of reattachment, the recovery pressure decreases with smaller aspect ratios. The three-dimensional side wall effects tend to slow down the relaxation downstream of reattachment for smaller aspect ratios as evidenced by the evolution of the velocity field. For the two smallest aspect ratios investigated, higher centerplane streamwise and transverse velocities were obtained which indicate a three-dimensional mean flow structure along the full span of the duct.

Stability of gravity-driven thin-film flow in the presence of an adjacent gas phase

2021 ◽  
Vol 135 ◽  
pp. 103443
Author(s):  
R. Kushnir ◽  
I. Barmak ◽  
A. Ullmann ◽  
N. Brauner
Keyword(s):  
Thin Film ◽  
Gas Phase ◽  
Film Flow ◽  
Thin Film Flow ◽  
Gravity Driven
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