Қазіргі білім берудің даму тенденциялары
113
– continuty equation. Physical meaning of this equation is conservation of mass for
fluid flow. The next two equation (2), (3) are equation of motions: speed
componentary direction by
u
and
v
. There are density, pressure, Reynolds number,
that is kinematic viscosity.
𝜕𝑢
𝜕𝑡
+ 𝑢
𝜕𝑢
𝜕𝑥
+ 𝑣
𝜕𝑢
𝜕𝑦
= −
1
𝜌
𝜕𝑃
𝜕𝑥
+
1
𝑅𝑒
(
𝜕
2
𝑢
𝜕𝑥
2
+
𝜕
2
𝑢
𝜕𝑦
2
)
(2)
𝜕𝑣
𝜕𝑡
+ 𝑢
𝜕𝑣
𝜕𝑥
+ 𝑣
𝜕𝑣
𝜕𝑦
= −
1
𝜌
𝜕𝑃
𝜕𝑥
+
1
𝑅𝑒
(
𝜕
2
𝑣
𝜕𝑥
2
+
𝜕
2
𝑣
𝜕𝑦
2
)
(3)
There are in the Picture 1 boundary conditions. Also, we have three obstacles
in the form buildings. The inlet is made from the part of the left side to the uppers
right side. At the entrance taken the component of the velocity u as 1 and v as 0. At
the boundaries taken the component of the velocity u and v as 0. At the boundary is
pressure is set by using the Newman conditions, but at the output is equal to 0.
Components of velocity at the boundaries are set by set using the Newman.
Picture 1. Boundary conditions with three obstacles.
Достарыңызбен бөлісу: