Unsteady Simulation

7/24/2019 Unsteady Simulation

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Geometry

In the Workbench window, double-click Fluid Flow(FLUENT).


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Geometry

Rename this project by clicking in the bottom of theFluid Flow (FLUENT) box.


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Geometry

Click to highlight Geometry in the Fluid Flow(FLUENT) box and change Analysis Type to 2D.


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Geometry

Right-click the Geometry icon and click NewGeometry.


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Geometry

Select Units to be Inches.


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Geometry

Left-click XYPLANE to highlight it and click NewSketch icon.


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Geometry

Click Sketching tab and sketch a rectangle around the

origin.


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Geometry

Draw a circle centered at the origin.


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Geometry

Click on the Dimension>Horizontal tab anddimension the rectangle to be 26.25 from the y-axis

and 96.25 in total length.


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Geometry

Click on the Dimension>Vertical tab and dimensionthe rectangle to be 43.75 from the x-axis and 87.5 in

total height.


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Geometry

Click on the Dimension>Diameter and dimension thecircle to be 3.5.

Click on the Generate tab.


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Geometry

Click to highlight the XYPlane and click on the NewSketch icon.

Draw a circle over top of the first circle with the samedimensions.

Click Generate.


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Geometry

Concept>Surfaces from Sketches.


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Geometry

Under Details View, change Surface From Sketches toSurface Sketch 1 and Operation to Add Frozen.


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Geometry

Concept>Surfaces from Sketches.


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Geometry

Under Details View, change Surface From Sketches to

Surface Sketch 2 and Operation to Add Frozen.


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Geometry

Under the Tree Outline, expand the 2 Parts, 2 Bodies(click on the plus sign), and left click the first SurfaceBody.

Under Details View, change Sketch 1 Fluid/Solid to

Fluid.


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Geometry

Under the Tree Outline, expand the 2 Parts, 2 Bodies(click on the plus sign), and left click the secondSurface Body.

Under Details View, make sure that Sketch 2Fluid/Solid is set to Solid.


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Geometry

File>Save Project As> Flow Over a Cylinder.


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Mesh

Under Outline, click Mesh. Change Relevance to 80.


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Mesh

Under Details of Mesh, set Use Advanced Size Function toOn: Proximity and Curvature, Relevance Center to Fine,Initial Size Seed to Active Assemble, Smoothing toMedium, Transition to Slow, Span Angle Center to Fine,Curvature Normal Angle 1.6 degrees, Proximity Accuracy to.5, and leave remaining values at the default values.


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Mesh

Under Details of Mesh>Inflation, change Use Automatic Tet Inflationto None, Inflation Option to Total Thickness, Number of Layers to 2,Growth Rate to 1.2, Maximum Thickness to 1 m, Inflation Algorith toPre, View Advanced Options to Yes, Collision Avoidance to LayerCompression, Fix First Layer to No, Gap Factor to .5, Maximum Heightover Base to 1, Growth Rate Type to Geometric, Maximum Angle to 100,

and leave all other settings at Default values.


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Mesh

Under Details of Mesh>Statistics, change Mesh

Metric to Skewness.


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Mesh

Click the Mesh tab at the top of the screen and selectGenerate Mesh.


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Mesh


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Mesh

Under Details of Mesh>Statistics>Max (Skewness),

check that Max Skewness is less than .7.


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Mesh


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Mesh

Under Outline, click Mesh>Insert>Method.


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Mesh

Under Outline, click Mesh>Insert>Mapped FaceMeshing.


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Mesh

Under Details of Mapped Face Meshing, changeGeometry to the rectangle minus the inner circle(sketch 1) and Radial Number of Divisions to 100.

Click the Update icon at the top of the screen.


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Mesh

Your new mesh should look like the picture above.


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Mesh

Check the Max Skewness and make sure that it is lessthan .7.


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Mesh

Click the edge selection tool and left-click the left sideof the rectangle. Right-click>Create Named Selection.


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Mesh

Name this line velocity inlet.

Click OK.


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Mesh

Click the edge selection tool and left-click the rightside of the rectangle. Right-click>Create NamedSelection.


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Mesh

Name this line pressure outlet.

Click OK.


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Mesh

Click the edge selection tool and left-click the innercircle. Right-click>Create Named Selection.


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Mesh

Name this line cylinder.

Click OK.


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Mesh

File>Save Project.


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Setup

In the Workbench window, right-click Setup>Edit.


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Setup

The FLUENT Launcher will appear.

Leave all default setting as they are and click OK.


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Setup

Under Problem Setup>Models, change Viscous to k-epsilon.


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Setup

Under Problem Setup>Materials, check that fluid isset to air and solid is set to aluminum.


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Setup

Under Problem Setup>Boundary Conditions, clickcylinder and set Type to wall.


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Setup

Under Problem Setup>Boundary Conditions, clickinterior-surface body and set Type to interior.


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Setup

Under Problem Setup>Boundary Conditions, click

interior-surface body.1 and set Type to interior.


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Setup

Under Problem Setup>Boundary Conditions, clickpressure_outlet and set Type to pressure-outlet.


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Setup

Under Problem Setup>Boundary Conditions, clicksurface_body-surface_body and set Type to wall.


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Setup

Under Problem Setup>Boundary Conditions, clickvelocity_inlet and set Type to velocity-inlet.

Click Edit.


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Setup

Change Velocity Magnitude (m/s) to 20.12.

Click OK.


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Setup

Under Problem Setup>Boundary Conditions, clickwall-surface_body-surface_body and set Type to wall.


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Setup

Under Problem Setup>Reference Values, changeCompute from to velocity_inlet, Area to .006207167,Depth to .0889, Length to .0889, Velocity to 20.12, and

Reference Zone to surface_body.


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Setup

Under Solution>Solution Methods, changeMomentum, Turbulent Kinetic Energy, and Turbulent

Dissipation Rate to Second Order Upwind.


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Setup

Under Solution>>Drag Monitor, check the boxesnext to Print to Console and Plot and select cylinder

under Wall Zones.


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Setup

Under Solution> Solution Initialization, set Computefrom to velocity inlet and X Velocity to 20.12.

Click Initialize.


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Setup

Under Solution>Run Calculation, change Number ofIterations to 1000.

Click Calculate.


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Setup

Under Results>Graphics and Animations, clickContours and Setup.

Change Contours of to Pressure: Total Pressure,change Levels to 20, and check the box next to Filled.

Click Display.


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Setup


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Setup

Under Results>Graphics and Animations, click Contoursand Setup.

Change Contours of to Velocity: Velocity Magnitude,change Levels to 20, and check the box next to Filled.

Click Display.


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Setup


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Setup

Under Results>Graphics and Animations, click Contoursand Setup.

Change Contours of to Velocity: Stream Function, changeLevels to 20, and check the box next to Filled.

Click Display.


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Setup


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Setup

Under Results>Graphics and Animations, clickContours and Setup.

Change Contours of to Velocity: Vorticity Magnitude,change Levels to 20, and check the box next to Filled.

Click Display.


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Setup


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Setup

Under Results>Graphics and Animations, click Vectors andSetup.

Change Vectors of to Velocity, Color by to Velocity: VelocityMagnitude and change Scale to 1 and Style to arrow.

Click Display.


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Setup

Date post:	20-Feb-2018
Category:	Documents
Upload:	manch-supreo
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Unsteady Simulation

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