FEM ConstraintHeatflux/ro

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Constraint initial temperature

Constraint temperature

Menu location
FEM ConstraintHeatflux
Model → Thermal Constraints → Constraint heatflux
Workbenches
FEM
Default shortcut
None
Introduced in version
-
See also
FEM tutorial
Contents 1 Descriere 2 Utilizare 3 Notă

Descriere

Această constrângere specifică schimbul de căldură (transferul de căldură al filmului) al unei suprafețe la temperatura T și cu un coeficient de schimb termic h și o temperatură ambiantă T₀ . Fluxul de căldură convectiv q poate satisface: q = h(T -T₀)

introduced in version 1.0: Can be also used to define a radiation heat flux on a surface. It satisfies: $q=\epsilon \sigma (T^{4}-T_{0}^{4})$ where $\epsilon$ is the surface emissivity and $\sigma$ is the Stefan-Boltzmann constant.

Utilizare

Click pe sau selctați Model → Thermal Constraints → Constraint heatflux din meniul principal.
Selectați în vizualizarea 3D suprafața/elepe care constrângerea trebuie aplicată.
Introduceți temperatura dorită a suprafeței, coeficientul filmului și temperatura ambiantă.

Notă

Constrângerea utilizează *FILM card in CalculiX. constrângerea fluxului de căldură este explicat la http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node203.html

Constraint initial temperature

Constraint temperature

FEM Analysis

Materials: Solid, Fluid, Nonlinear mechanical, Reinforced (concrete); Material editor

Element geometry: Beam (1D), Beam rotation (1D), Shell (2D), Fluid flow (1D)

Constraints

Electromagnetic: Electrostatic potential, Current density, Magnetization

Fluid: Initial flow velocity, Initial pressure, Flow velocity

Geometrical: Plane rotation, Section print, Transform

Mechanical: Fixed, Displacement, Contact, Tie, Spring, Force, Pressure, Centrif, Self weight

Thermal: Initial temperature, Heat flux, Temperature, Body heat source

Overwrite Constants: Constant vacuum permittivity

Mesh: Mesh Netgen, Mesh GMSH, Mesh boundary layer, Mesh region, Mesh group, Nodes set, Mesh to mesh

Solve: CalculiX Standard, Elmer, Mystran, Z88; Equations: Deformation, Elasticity, Electrostatic, Electricforce, Magnetodynamic, Magnetodynamic 2D, Flow, Flux, Heat; Solver: Solver control, Solver run

Results: Purge, Show; Postprocessing: Apply changes, Pipeline from result, Warp filter, Scalar clip filter, Function cut filter, Region clip filter, Contours filter, Line clip filter, Stress linearization plot, Data at point clip filter, Filter function plane, Filter function sphere, Filter function cylinder, Filter function box

Utilities: Clipping plane, Remove clipping planes, Open FEM examples; Mesh clear, Mesh display info

Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types

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