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Gravity and Boundary Conditions

Application ID: 2152


The influence of gravity on the flow pattern is often an important issue when modeling flow in fluids with variable density. You can account for this influence in the model equations by adding, to the momentum balances, the volume force.

This model shows a simple example of the implementation of boundary conditions when volumetric forces are included in the momentum balances. This can be used to account for hydrostatic pressure and to account for density variations in free convection problems.

This application was built using the following:

CFD Module

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.