This slide deals with different aspects of Comsol Multiphysics and its possibility in the future as multiple physics properties can be studied simultaneously with the help of software

1. PROJECT ON
COMSOLE MULTIPHYSICS
SURAJ KUMAR (GCT-1731670)
DIVYA (GCT-1731671)
SWIKRITI RANJAN (GCT-1731673)
PANKAJ KUMAR (GCT-1731674)

2. COMSOL Multiphysics
COMSOL Multiphysics is a powerful interactive environment for modeling
and solving all kinds of scientific and engineering problems based on
partial differential equations (PDEs).
With this software you can easily extend conventional models for one type
of physics into Multiphysics models that solve coupled physics
phenomena - and do so simultaneously.

3. PDEs form the basis for the laws of science and provide the foundation for
modeling a wide range of scientific and engineering phenomena.
When solving the PDEs, COMSOL Multiphysics uses the finite element method
(FEM). The software runs the finite element analysis together with adaptive
meshing and error control using a variety of numerical solvers.

4. COMSOL Application
You can use COMSOL Multiphysics in many application areas, just a few
examples being:
• Chemical reactions
• Diffusion
• Fluid dynamics
• Fuel cells and electrochemistry

5. COMSOL Multiphysics
• Many real-world applications involve simultaneous couplings in a system of
PDEs - Multiphysics.
• COMSOL Multiphysics offers modeling and analysis power for many
application areas. For several of the key application areas optional modules
are provided. These application-specific modules use terminology and
solution methods specific to the particular discipline, which simplifies
creating and analyzing models. The COMSOL 3.5 product family includes
the following modules:

6. The Chemical Engineering Module
The Chemical Engineering Module presents a powerful way of modeling
equipment and processes in chemical engineering.
It provides customized interfaces and formulations for momentum, mass, and
heat transport coupled with chemical reactions for applications such as:
• Reaction engineering and design
• Heterogeneous catalysis
• Separation processes
• Process control together with Simulink

7. The Chemical Engineering Module …
COMSOL Multiphysics excels in solving systems of coupled nonlinear PDEs that can
include:
• Heat transfer
• Mass transfer through diffusion and convection
• Fluid dynamics
• Chemical reaction kinetics
• Varying material properties
The Multiphysics capabilities of COMSOL can fully couple and simultaneously model
fluid flow, mass and heat transport, and chemical reactions.

8. The Modeling Process
The modeling process in COMSOL consists of six main steps:-
1. Selecting the appropriate application mode in the Model Navigator.
2. Drawing or importing the model geometry in the Draw Mode.
3. Setting up the subdomain equations and boundary conditions in the Physics Mode.
4. Meshing in the Mesh Mode.
5. Solving in the Solve Mode.
6. Postprocessing in the Postprocessing Mode.

9. 1. The Model Navigator
When starting COMSOL Multiphysics, you are greeted by the Model Navigator. Here you
begin the modeling process and control all program settings. It lets you select space
dimension and application modes to begin working on a new model, open an existing
model you have already created, or open an entry in the Model Library.
COMSOL Multiphysics provides an integrated graphical user interface where you can
build and solve models by using predefined physics modes

10. 2. Creating Geometry
An important part of the modeling process is creating the geometry. The COMSOL
Multiphysics user interface contains a set of CAD tools for geometry modeling
in 1D, 2D, and 3D.
The CAD Import Module provides an interface for import of Parasolid, SAT
(ACIS), STEP, and IGES formats.
In combination with the programming tools, you can even use images and
magnetic resonance imaging (MRI) data to create a geometry.

11. Axes and Grid
• In the COMSOL Multiphysics user interface you can set limits for the model
axes and adjust the grid lines. The grid and axis settings help you get just the
right view to produce a model geometry. To change these settings, use the
Axes/Grid Settings dialog box that you open from the Options menu. You can
also set the axis limits with the zoom functions.

12. 3. Modeling Physics and Equations
From the Physics menu you can specify all the physics and equations that define a
model including:
• Boundary and interface conditions
• Domain equations
• Material properties
• Initial conditions

13. 4. Creating Mesh
When the geometry is complete and the parameters are defined, COMSOL
Multiphysics automatically meshes the geometry. However, you can take charge of
the mesh-generation process through a set of control parameters.
For a 2D geometry the mesh generator partitions the subdomains into triangular or
quadrilateral mesh elements.
Similarly, in 3D the mesh generator partitions the subdomains into tetrahedral,
hexahedral, or prism mesh elements.

14. 5. Solution
Next comes the solution stage. Here COMSOL Multiphysics comes with a suite of
solvers for stationary, eigenvalue, and time-dependent problems.
For solving linear systems, the software features both direct and iterative solvers. A
range of preconditioners are available for the iterative solvers. COMSOL sets up
solver defaults appropriate for the chosen application mode and automatically
detects linearity and symmetry in the model.
A segregated solver provides efficient solution schemes for large Multiphysics
models, turbulence modeling, and other challenging applications.

15. 6. Postprocessing
For postprocessing, COMSOL provides tools for plotting and postprocessing any model
quantity or parameter:
• Surface plots
• Slice plots
• Iso surfaces
• Contour plots
• Arrow plots
• Streamline plots and particle tracing
• Cross-sectional plots
• Animations
• Data display and interpolation
• Integration on boundaries and subdomains

16. Report Generator
To document your models, the COMSOL Report Generator provides a
comprehensive report of the entire model, including graphics of the geometry,
mesh, and postprocessing quantities.
You can print the report directly or save it as an HTML file for viewing through a
web browser and further editing.