Process Control Using a PID Controller
Application ID: 866
This model shows how a flow model can be coupled to a process control mechanism.
Controlling application parameters according to other application parameters is important within process engineering. Most control mechanisms use the data at a wall or an outlet to control inlet parameters. More accurate control can occur if you can control inlet parameters due to data found within a component or piece of equipment.
This model couples mass transfer to fluid flow with two inlets (one controlled) and a PID controller. In this case, fluid flow is controlled according to the concentration at a point within the geometry - therefore a requirement for a physical model.
The model makes use of Projection variables in order to couple the Ordinary differential equation of the PID controller to the concentration point and the inlet velocity.
This application was built using the following:COMSOL Multiphysics®
The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product\'s capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.