FEM ConstraintHeatflux/ro
|
|
| Menu location |
|---|
| Model → Thermal Constraints → Constraint heatflux |
| Workbenches |
| FEM |
| Default shortcut |
| None |
| Introduced in version |
| - |
| See also |
| FEM tutorial |
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)
Heat sink with convective heat flux load on the surfaces exposed to air
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.
Properties
- DateAmbient Temp: Ambient temperature (for Convection and Radiation modes).
- DateFilm Coef: Film coefficient (for Convection mode).
- DateEmissivity: Emissivity (for Radiation mode).
- DateDFlux: Distributed heat flux (for DFlux mode).
- DateConstraint Type: Type of heat flux load: DFlux, Convection or Radiation.
- DateCavity Radiation - introduced in 1.1: Enable cavity (surface-to-surface) radiation (for Radiation mode).
- DateCavity Name - introduced in 1.1: Name of the cavity definition to which the heat flux constraint belongs (for Radiation mode).
- DateEnable Amplitude - introduced in 1.1: Enables the use of CalculiX's amplitude for time variation of the heat flux load. At a given time, magnitude of the load is multiplied by the amplitude value corresponding to that time. Linear interpolation is used between the specified values. Constant values are used outside of the specified range.
- DateAmplitude Values - introduced in 1.1: Amplitude table in the following format:
time_1, amplitude_value_1 ...
- Default is linear increase from 0% at t=0 to 100% at t=1:
0, 0 1, 1
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
FEM
- 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
- 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
- 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
- Additional: Preferences; FEM Install, FEM Mesh, FEM Solver, FEM CalculiX, FEM Concrete; FEM Element Types
User documentation
- Getting started
- Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
- Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate
- Help: Tutorials, Video tutorials
- Workbenches: Std Base, Assembly, BIM, CAM, Draft, FEM, Inspection, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub