Comsol_(finished)

5 Model Builder, Mesh 2, Size .

, .

6Size settings, Element Size, Custom .

7Element Size Parameters, :

-mh/2 Maximum element size, mh 6 mm.

-mh/2-mh/6 Minimum element size.

-0.2 Curvature factor.

8Build All . busbar_I.mph.

Mesh 1 Mesh 2 Mesh..

Advanced Topics | 81

, mh, “Global Definitions” 50.

(Adding Physics)

COMSOL , ,. , , , .,.

(STRUCTURAL MECHANICS)

, , .? ,.

, Structural Mechanics Module MEMS Module (

Solid Mechanics).

82 | Advanced Topics

, Structural Mechanics Module MEMS Module, “Cool by Adding Fluid Flow” 89.

1busbar.mph, .File > Save As busbar_II.mph.

2Model Builder, . Component 1

Add Physics .

3Add Physics, Structural Mechanics, Solid Mechanics .

,,.Add to Component ,Add to Component .

4 Add Physics

.

, , , , .

ၥၦၤၧၞၦၧၤၡၢၗၢ.

Advanced Topics | 83

5Model Builder.

Multiphysics Thermal Expansion.

Thermal ExpansionModel Builder.

6Thermal Expansion settings Domain SelectionAlldomains. ,.

Thermal Expansion Properties section Coefficient of thermal expansion Strain reference temperature. Coefficientof thermalexpansion . Strain reference temperature293.15 K () ,. Thermal Expansion. ,..

84 | Advanced Topics

7. Solid Mechanics Fixed Constraint .

8Fixed Constraint., . , Selection list.

9,8, 15 43.

8

43

15

Study, .

(SOLVING FOR JOULE HEATING AND THERMAL EXPANSION)

,. , ’ . ,,- .

Advanced Topics | 85

1Model Builder, .

Study 1 Study Steps > Stationary > Stationary .

,

2Study 1, Step 1: Stationary node .

3Stationary settings , Physics and Variables Selection.

4Solid Mechanics (solid) Solve for, , , Solid Mechanics Study 1.

Electric Currents (ec) Heat Transfer in Solids (ht) .

5 Study 1, Step 2: Stationary 2 .

86 | Advanced Topics

6Physics and Variables Selection, Electric Currents (ec) Heat Transfer in Solids (ht), ,,

Joule heatingStep 2.

7.

Study 1 Compute ( F8) ’.

busbar_II.mph, Solid Mechanics interface ’ .

(RESULTING DEFORMATION)

.

1 Results>3D Plot Group 4, Surface 1.

Advanced Topics | 87

2Surface settings Expression , Replace Expression .

SolidMechanics> Displacement> Total Displacement.solid.disp in Expression.

3Range,. Manual color range.

COMSOL . .

4Model Builder, Results>3D Plot Group 4, .Surface 1 Deformation .

, ,.

88 | Advanced Topics

5 busbar_II.mph,

(COOL BY ADDING FLUID FLOW)

,, ,, , .- .

CFD Module, Non-Isothermal Flow multiphysics interface . Heat Transfer Module,Conjugate Heat Transfer multiphysics interface .

- ,.

, .. ,.

, ,:

Air outlet

Air inlet

Advanced Topics | 89

(DEFINING INLET VELOCITY)

.

1, New window, ’ , Cancel.

2Model Libraries

Home

COMSOL Multiphysics> Multiphysics>busbar_box., ,.

3Global Definitions

Parameters .

4Parameters settings , Vtot. Name Vin. 1e-1[m/s] ExpressionDescription.

5File>Save As

busbar_box_I.mph.

90 | Advanced Topics