Adding Extra Dimensions to a Model

To add an extra, abstract spatial dimension to a model, right-click the node (

), and then from the context menu, choose , , , , or to add an extra dimension to the selected space dimension (requires that is selected in the dialog box). An node, in the chosen space dimension, is then added under the node in the Model Builder. You can add one or several nodes. It is also possible to attach an extra dimension to several components. Extra dimensions can be useful, for example, to model transport and reactions in two different scales, where one scale is the homogenized scale of a set of larger pores between particles or larger cracks in rocks, and a second smaller scale is the one inside porous particles or in porous rock.

The added node then contains these default nodes: , , and . The settings for the node are the same as for the node, except it has a unique .

	The default nodes associated to the Extra Dimension are considered the extra dimension geometry and extra dimension mesh. The original geometry and mesh are called the base geometry and base mesh. Before you can use the extra dimensions in physics interfaces, they must be attached on a selection in the base geometry.

The default node label in the field is for the first node. The component name is a string used to identify variables in the model. The default Extra Dimensions component name is xdim1, xdim2, and so on, but you can change it in the field.