w01 SS Heat Transfer

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WORKSHOP 1

STEADY STATE HEAT TRANSFER

WORKSHOP 1

STEADY STATE HEAT TRANSFER


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Mar120, Workshop 10, March 2001 WS 1-2


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Model Description

In this Exercise, the following structure will be subjected to thedesignated thermal (temperature and convective) loading and

analyzed to determine the steady-state temperature distribution.


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Objective Demonstrate the use of thermal analysis with temperature loading.

Required A file named Thermal_structural.ses in your working directory

(Ask your instructor for it if you dont see it before starting.)


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Suggested Exercise Steps1. Create geometry by running the session file.

2. Create the temperature fields.

3. Create the material properties.

4. Create the Loads and BCs.

5. Submit the job to analysis.

6. Evaluate the results.


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CREATE NEW DATABASE

Open a new database. Name itthermal_structural.db

a. File: New

b. Enterthermal_structural.db

as the file name.

c. Click OK.

d. Enter2.00 for the ModelDimension.

e. Select MSC.Marcas theAnalysis Code.

f. Select Thermalas theAnalysis Type.

g. Click OK.

a

thermal_structuralb

MSC.MarcT e

ThermalT f

g

2.00 d

c


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Step 1. Runthe Provided Session File

Create necessary geometry byplaying the session file.

a. File: Session / Play.

b. SelectThermal_structural.ses .

c. Click Apply.

Thermal_structural

Thermal_structural.sesc

b

After clickingApply, youwill see the model being

constructed automaticallyby the session file.

Your model should look like this.

a


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Step 2. Fields:Create / Material Property / TabularInput

Define temperature dependentmaterial property table forconductivity.

a. Fields: Create / MaterialProperty / TabularInput.

b. Enterconductivity field forField Name.

c. Select Temperature (T) forActive Independent Variables.

d. Click Input DataEnter the followingvalues:

e. Click OK.

f. Click Apply.

T Value

1 14.6538

6 22.6 8714 31.8197 e

conductivity field

a

b

f

c

d

To modify the content of aparticular cell, first click onthat cell, then type numberinInput ScalarData boxand press Enter.


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Conductivity_fieldd

e

f

Step 3.Materials:Create / Isotropic / Manual Input

Create the relevant materialproperties for 17-4 pH stainless steel

a. Material: Create / Isotropic /Manual Input.

b. EnterStainless 17-4 pH formaterial name.

c. Click Input Properties.

d. Click inConductivitypanel.

e. Select conductivity_field.

f. Click OK.

g. Click Apply.

stainless 17-4 pH

After you Apply you will seestainless_17-4_pH inExisting Materials panel.

stainless 17-4 pH

a

b

c

g


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Step 4. Properties:Create / 3D / Solid

Apply the steel properties to themodel

a. Properties: Create / 3D / Solid.

b. EnterPropthermal forProperty Set Name.

c. Click Input Properties.

d. Click inMaterial Name panel.

e. Select Stainless_17-4_PH.

f. Click OK.

g. Click in the SelectMemberspanel.

Stainless 17-4 pH d

e

f

Prop thermal

a

b

c

g


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h. Select all solids withthe mouse.

i. Click Add.

j. Click Apply.

h

Select all solids by pressing andholding cursor to capture theentire geometry

i

j


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Create the temperature loading atthe fixed end faces.

a. Loads/BCs: Create / Temp(thermal) / Nodal.

b. Enterleft_edgefor New Set

Name.

c. Click Input Data.

d. Enter 0 for Temperature.

e. Click OK.

f. Click Select ApplicationRegion.

g. Click inSelect GeometryEntities panel.

h. Select SurfaceorFacepicking icon.

Step 5. Loads/BCs:Create / Temp (Thermal) / Nodal

left_edge

a

b

c

f

50

d

e

g

h


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i. Select Faces 1, 2, and 3.

j. Click Add.

k. Click OK.

l. Click Apply.

left_edge

left_edge

l

Solid 8.2 9.2 10.4

j

k

Face 1, 2, 3 @ 50C

Face 4, 5, 6 @ 135C

Face 3Face 2

Face 1

Face 4

Face 5

Face 6

i

The geometry may need to berotated in order to select the faces

AfterclickingApply,left_edge will

appearin Existing Sets window


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Repeat steps a-l for a newtemperature load.

a. Enterright_edge for New setName.

b. OpenInput Dataform.

c. Enter135 for Temperature.

d. Click OK.

e. OpenSelect ApplicationRegionform.

f. Click into Select GeometryEntitiespanel.

g. Select faces 4, 5, and 6 forGeometry Entry.

h. Click Add.

i. Click OK.

j. ClickApply-.

Face 1, 2, 3 @ 50C

Face 4, 5, 6 @ 135C

Face 3

Face 2

Face 1

Face 4

Face 5

Face 6

g

The viewport looks like this afterboth temperature loads wereapplied at selected end surfaces

right_edge a

b

ej

135 c

d

f

i

h


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Step 6. Loads/BCs:Create / Convection / Element Uniform

Create the temperature loading atthe fixed end faces.

a. Create / Convection / ElementUniform.

b. Enterconvection for New Set

Name.

c. Click Input Data.

d. Enter20 forConvection.

e. Enter30 forAmbient Temp.

f. Click OK.

g. Click Select ApplicationRegion.

30

20 d

e

f

convection

a

b

c

g


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h. Click inSelect SolidsFaces panel.

i. Select Free faceofsolid

picking icon.j. Select the four outer

middle bar surfaces bypartly enclosing them withviewcornerpicking.

k. Click Add.

l. Click OK.

m. Click -Apply-.

m

j

This picks the four largersurfaces bounding thecentral body when you usethe default picking options.

Solid 1:11:10.1 1:11:10.2

1:11:10.3 1:11:10.4

hk

l

After clickingAdd, theselected solid will appearin the Application Region

window as shown

i


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Step 7. Analysis: Analyze / EntireModel / Full Run

Submit the model for thermalanalysis.

a. Analysis: Analyze / EntireModel / Full Run.

b. Enterthermal_job1 for Job

Name.

c. Click Load StepCreation.

d. Enterthermal for Job StepName.

e. Click Apply.

f. Click Cancel.

thermal_job1

a

b

c

thermal d

e f

After clicking apply, thermalwill appear in the AvailableJob Steps window along with

the Default Static: Step


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g. Click Load Step Selection.

h. Select thermal in Existing JobSteps window.

i.D

eselect Default Static Step.j. Click OK.

k. Click Apply.

g

k

Make sure thermal is the only entry in theSelected Job Steps window.IfDefault Static

Step shows up, remove it by clicking on it.

Once the Analysis is launched, you can monitorthe progress of the job by looking at thethermal_job1.out and thermal_job1.sts files.

h

j

i


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Step 8. Results:Create / Quick Plot

Post process the results of thethermal analysis.

a. Results: Create / Quick plot.

b. Click Reset Graphics.

c. Select Temperature, Nodal inSelect Fringe Result window.

d. Click Apply.

The steady state temperaturedistribution should look like thisin the viewport window.

ba

c

d

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w01 SS Heat Transfer