Overview of the User’s Guide
The Microfluidics Module User’s Guide gets you started with modeling microfluidic systems using COMSOL Multiphysics. The information in this guide is specific to this module. Instructions how to use COMSOL Multiphysics in general are included with the COMSOL Multiphysics Reference Manual.
As detailed in the section Where Do I Access the Documentation and Application Libraries? this information can also be searched from the COMSOL Multiphysics software Help menu.
Modeling in Microfluidics
The Microfluidic Modeling chapter familiarizes you with modeling procedures useful when working with this module. Topics include Physics and Scaling in Microfluidics, Dimensionless Numbers in Microfluidics, Modeling Microfluidic Fluid Flows, Modeling Coupled Phenomena in Microfluidics, and Modeling Rarefied Gas Flows.
The Fluid Flow Branch Interfaces
There are several fluid flow interfaces available. The various types of momentum transport that you can simulate include laminar and creeping flow, multiphase two-phase flow, and flow in porous media. Every section describes the applicable physics interfaces in detail and concludes with the underlying interface theory.
Single-Phase Flow
Single-Phase Flow Interfaces chapter describes the Laminar Flow, Creeping Flow and Incompressible Potential Flow interfaces.
Multiphase Flow Two-Phase Flow
Multiphase Flow, Two-Phase Flow Interfaces chapter describes the Laminar Two-Phase Flow Level Set and Phase Field interfaces, as well as the Laminar Three-Phase Flow, Phase Field and the Laminar Two-Phase Flow, Moving Mesh interface. Some multiphase flow is described using the Phase Field in Fluids, Level Set, and Ternary Phase Field interfaces found under Mathematics, Moving Interfaces branch. In this module, these physics are already integrated into the relevant physics interfaces.
Porous Media and Subsurface Flow
Porous Media Flow Interfaces chapter describes the Darcy’s Law, Brinkman Equations, and Free and Porous Media Flow interfaces.
Rarefied Flow
Rarefied Flow Interface chapter describes the Slip Flow interface, including the underlying theory.
The Chemical Species Transport Branch Interfaces
The transport and conversion of material is denoted as chemical species transport. Chemical Species Transport Interfaces chapter describes the Transport of Diluted Species and the Transport of Diluted Species in Porous Media as well as the underlying theory.