Abstract
Numerical integration is conducted for twodimensional incompressible laminar flow over a 90° corner. Using Newton’s method, the NavierStokes equations are generated up toRe=2800, with the result that the corner generates a second bubble nearRe=800. There exist distinct patterns for the evolution of the pressure gradient and the position of a separation point. AsRe is increased the pressure gradient tends to approach zero over the recirculated region and shows sharper variations near the separation and reattachment points. Thus, these results confirm the free streamline model for separation proposed by Sychev.
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Abbreviations
 i :

Index to denote the step number in ξdirection
 I :

i at the downstream edge ξ=ξ_{ m }
 j :

Index to denote the step number in ηdirection
 J :

j atη=η _{ m }
 M :

Jacobian forz→σ
 p :

Nondimensional pressure
 Re :

Reynolds number
 s :

Coordinate along the wall
 w :

x _{1}+iy _{1}
 x _{1},y _{1} :

Coordinate system inwplane
 x, y :

Coordnate system inzplane
 x _{s} :

Separation point
 z :

x+iy
 ζ:

Vorticity
 η:

Normal component of ρ
 η _{ m } :

Displacement thickness of the boundary layer flow over a wedge
 η _{ m } :

η at the upper edge
 ξ:

Tangential component of ρ
 ε _{ m } :

ξ at the downstream edge
 ρ:

ξ+i η
 T :

Wall shear defined as Eq. (14)
 Ψ:

Stream function
 Ψ:

Eq. (6)
 Ψ _{ m } :

Ψ atη=η _{ m }
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Correspondence to Yong Kweon Suh.
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Suh, Y.K., Park, C.K. Incompressible laminar flow near a corner of 90° angle. KSME Journal 1, 121–127 (1987). https://doi.org/10.1007/BF02971655
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Key Words
 Corner
 Newton’s Method
 Second Bubble
 Separation
 Boundary Layer
 Free Streamline Model