[Example 3] Flow in a Sine-Generated Curve Channel¶
Create Computational Grid¶
From the main menu, select [Grid], [Select Algorithm to Create Grid] ( Figure 55 )
Select [Simple Grid Generator] in Figure 56 , and click [OK].
Set “Channel Shape” values as Figure 57
Set “Channel Bed Condition” values as Figure 58 , and click [Create Grid]. Click [Yes(Y)] when you are asked “Figure 59 . Then the grid creation is completed.
Bed configuration and channel shape can be confirmed by putting checking marks at, [Grid], [Node attributes] and [Elevation (m)]. ( Figure 60 )
From the menu bar, select [Calculation Condition], [Settings] and [Calculation Condition] window, Figure 61 appears.
In Figure 61 , select [Discharge and downstream water surface elevation] and click [Edit].
Input discharge hydrograph as shown in Figure 62 and click [OK].
Select [Time and bed erosion parameters] and set values as Figure 63 .
Set [3D Velocity Profile] as Figure 64, and click [Save and Close]
By selecting [Simulation] and [Run], a window as Figure 65 appears, and the simulations starts.
When the simulation finish, Figure 66 appears. Then click [OK].
Display Computational Results¶
After the companion finished, form the main menu, by selecting [Calculation Results] and [Open new 2D Post-Processing Window], a new Window appears as Figure 67 .
In the object browser, put the check marks in “Scalar (node)” and “Depth[m]”, right-click and select “Properties”. The “Scalar Setting” window Figure 68 appears.
Set the values as shown in Figure 68, and click [OK], then Figure 69 appears.
In the object browser, put the check marks in “Arrow” and “Velocity”, right-click and select “Properties”. The “Arrow Setting” window Figure 70 appears. Set the values as Figure 70, and click [OK].
Figure 71 shows the depth-averaged velocity vectors.
In Figure 71, you can select “Surface Velocity” and “Bottom Velocity” by checking each box in “Arrow” group.
Uncheck the box by “Arrow” in the Object Browser and check a box by “Streamline”. By checking “Velocity”, the streamlines following the depth averaged flow velocity” Figure 74 will be displayed. By checking “Surface Velocity”, the streamline following the surface velocity” Figure 75 will be displayed. By checking “Bottom Velocity”, the streamline following the bottom velocity ne: numref:03_kekka_11 will be displayed.
The effect of the secondary flow is clearly shown.
In the object browser, uncheck the box of [Streamlines], and check the boxes of [Particles] and [Velocity], and set the time bar back to zero, as shown in Figure 77 Click small black play button, and particle animation starts as Figure 78, which shows the particles following depth averaged flow.
In the same way, the particle flowing animations can be played by checking a box at [Surface Velocity], and [Bottom Velocity], respectively.