Layout

The Lithospheric Modelling Recipe is split into seperate XML files, each of which focus on a particular aspect of the model. When Underworld runs, it combines all the XMLs into one file, and then uses that single file as input.

Layout of XML files

Commonly modified

• lmrMaterials.xml - Define materials using shapes and by combining rheological parameters from the lmrRheologyLibrary.xml file

• lmrVelocityBoundaries.xml - Define the velocity conditions at the edges or within the model. The example provided uses extension free-slip velocity conditions.

• lmrThermalBoundaries.xml - Define the thermal boundary conditions of the model, e.g., constant temperature, heat flux.

• lmrInitials.xml - Define the initial conditions of the model, e.g., the initial geotherm.

Occasionally Modified

• lmrAuxiliary.xml - A file to add any additional behaviour you might want. The example provided is for basic surface processes.

• lmrPassiveTracers.xml - Passive tracers allow you to track variables at discrete points within your model. The example provided places a line of tracers at the surface and at the moho.

Rarely Modified

• lmrNumerics.xml - Data output, such as what is checkpointed, is defined here. Contains implementations of the fundamental forces: buoyancy, thermal energy terms. The Ppc Manager is defined here (but additions should be made in lmrAuxilary.xml), and a lot of additional solver stuff.

• lmrRheologyLibrary.xml - A library of rheological parameters: density, radiogenic heating, flow laws, etc.

• lmrMain.xml - Underworld calls this file to run.