COMSOL Multiphysics for Industry -...
Transcript of COMSOL Multiphysics for Industry -...
Structural Analysis in COMSOL
– Static – Transient (Direct or modal) – Frequency response (Direct or
modal) – Eigenfrequency (modal analysis) – Damped eigenfrequency – Prestressed eigenfrequency – Prestressed Frequency response – Thermal stress – Elastoplastic
– Viscoelastic – Creep – Hyperelastic – Poroelastic – Contact – Buckling – and more, including Multiphysics
analysis: Flow, Electromagnetics, Heat, Piezo, Acoustics
• Analysis types available
Constitutive law for linear materials
• Isotropic
– Young’s modulus and Poisson’s ratio
– Lamé constants
– Bulk and shear moduli
– Pressure and shear wave speeds
• Orthotropic
– 9 material properties
• Anisotropic
– 21 material properties
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Nonlinear Structural Analysis
• Geometric Nonlinearity
• Material Nonlinearity
• Boundary Nonlinearity
Material nonlinearity
• COMSOL supports materials that can be: – spatially varying
– discontinuous
– Nonlinear (e.g. function of temperature)
– complex valued (frequency domain)
– frequency dependent (frequency domain)
– time-dependent (time domain)
• Simply type it in!
Peristaltic Pumps
• Valuable for pumping abrasive fluids, corrosive fluids and delicate
fluids
• Rugged pump design requiring minimal maintenance
• Used in pharmaceutical, petrochemical, biomedical and food
processing industries
Benefits of using COMSOL for FSI
• Automatic calculation of total fluid forces.
• Automatic identification of solid-fluid interface.
• Automatic application of correct boundary conditions at the solid-
fluid interface.
• Ability to move computational mesh based on deformation of solid.
• Accurate calculation of fluid flow on moving mesh.
CFD Analysis
• Ease-of-use – Tailored functionality and interfaces
for fluid dynamics, reacting flows, and
heat transfer
– Robustness
• Efficiency – State-of-the-art performance, for a
given accuracy, in terms of memory
use and computational time
• Multiphysics – Fluid flow with any physics
combinations Fluid flow past a solar panel. The model calculates
the forces exerted by the wind on the structure.
Single-Phase Flow Capabilities
• Laminar flow – Newtonian and non-Newtonian flow
• Turbulent flow
– k- turbulence model, wall functions
– k- turbulence model
– Low Re k- turbulence model
– Spalart-Allmaras
• Rotating Machinery – Laminar and turbulent
The Single-Phase Flow Interfaces as displayed
in the Physics Interface list in the CFD Module.
The module features an interface
for rotating machinery.
Multiphase Flow Capabilities
• Separated Flows – Two-Phase Flow, Level Set
– Two-Phase Flow, Phase Field
• Disperse Flows – Mixture Model
– Bubbly Flow
– Euler-Euler Flow
The Multiphase Flow Interfaces as
displayed in the Physics Interface list in the
CFD Module.
Startup of a fluidized bed
modeled using the Euler-
Euler Model Interface
Thin Film and Porous Media Flow Capabilities
• Porous media flow – Free and porous media flow including
Forchheimer drag
– Darcy’s law and Brinkman equations
– Two-phase flow, Darcy’s Law
• Thin-Film Flow – For lubrication and flow in narrow
structures, which are then
approximated with 3D shells
Pressure and average film velocity in a journal
bearing modeled using the Lubrication, Shell
Interface.
The Thin-Film Flow and the Porous Media
and Subsurface Flow Interfaces in the
Physics Interface list in the CFD Module.
Non-Isothermal Flow and Conjugate Heat
Transfer Capabilities
• Non-Isothermal Flow and Conjugate
Heat Transfer – Laminar and turbulent flows
– Fully compressible flow for Ma < 0.3
– Heat transfer in fluids and solids with and
without boundary layer approximations
• Heat Transfer in Porous Media – Porous media flow coupled to heat transfer
in the solid matrix and pore fluid
Flow and heat
transfer analysis
in the metal
structure and
cooling channels
in a turbine stator.
The Physics Interfaces with flow and heat
transfer as displayed in the CFD Module.
High Mach Number Flow Capabilities
• High Mach Number Flow – Laminar and Turbulent flows
– k- turbulence model
– Spalart-Allmaras
– Fully compressible flow for all Mach
numbers
The Physics Interfaces for High Mach
Number Flow as displayed in the CFD
Module.
Turbulent compressible flow in a two-dimensional
Sajben diffuser. The flow reaches sonic conditions at
the throat of the diffuser, terminating with a shock in
the diverging section.
Thermal Analysis in COMSOL
Conduction
Heat transfer by
translation of solids Convection in fluids Radiation
Bioheating Thermal modeling can
include many different
effects, and can be
solved for both steady
state and transient
conditions.
Heat transfer by conduction considers:
• Fourth order (radiative) boundary
conditions
• Correlations for convective heat
transfer
• Multi layered thermal resistance
boundary conditions
• Highly conductive layers of material
• Modeling of infinitely large domains
• Out-of-plane approximations
• Conductive heat transfer through
stationary materials
• Transient, non-linear, effects
• Temperature dependent material
properties
• Fully anisotropic material properties
• Applied heat load boundary
conditions
• Temperature sink boundary
conditions
• Heat transfer coefficient boundary
conditions
Model of temperature sensor
Continental Corporation
• Heat transfer via bulk motion of a solid material
• Additional numerical stabilization for faster solutions
• Heating of the domain via pressure work
• Convective flux boundary condition
Heat transfer by translation of solids considers:
Heat generation and heat transfer
in a rotating disk brake system
Heat transfer by convection considers:
• Heat transfer due to gas or liquid motion
• Temperature dependence of
fluid properties
• Coupling to both laminar and
turbulent flows
• Temperature and pressure
dependence of fluid
• Numerical stabilization techniques
• Dedicated solvers for large 3D problems
• Viscous heating
• Ideal gas relationships
• Automatic coupling with
heat transfer in solids (conjugate heat transfer)
Non-isothermal flow in conjugate heat transfer
for modeling of electronic cooling devices
Heat transfer by radiation considers:
• Heat transfer between the surfaces of opaque solids
• Calculation of grey body radiation view factors
• Temperature dependent emissivity
• Shadowing and diffuse reflection
• External radiation sources
Modeling of heat transfer
for aerospace applications
usually involves
surface-to-surface radiation
Bioheating considers:
• Heat transfer in living tissue
• Tissue and blood properties
• Blood perfusion rate
• Arterial blood temperature
• Metabolic heat rate
• Heating from other
phenomena (RF,DC current) Microwave heating in the SAM
Phantom head due to microwave
radiation from an antenna
Friction Stir Welding - Working principle
• Pore free weld joint
• No residual stresses due to shrinking
• Welding of dissimilar materials and plastics possible
Joint to weld
Rotating weld tool
Reacting Flow Capabilities
• Multi-component transport and flow in
diluted and concentrated solutions – Fickean and mixture-averaged formulations
– Includes migration of charged species in
electric fields
– Includes mass transport in free and porous
media flow
• Concentration-dependent density and
viscosity in flow description
Turbulent reacting flow in a multi-jet
reactor in a polymerization process.
The Chemical Species Transport interfaces
as displayed in the CFD Module.
Bulk and Fine Chemicals Production
Velocity field, and concentration and temperature
distributions in a steam reformer
AC/DC Module Application Examples
Motors & Generators Electronics Inductors
Joule Heating and Induction Heating Capacitors Ion Optics and Charged
Particle Tracing
RF Module Application Examples
Antennas
Waveguides and Filters
Radiation Patterns Scattering
Microwave Heating Plasmonics and Metamaterials