If a solid construction interacts with a fluid, both the solid and fluid can be modeled with the materi equation. Interaction forces between solid and fluid will automatically be generated. If required, a temperature field may be imposed. An example of a input file is given below
...
materi_velocity
materi_stress
condif_temperature
end_initia
...
element_group -ra -from 0 -to 100 -ra 1
element_group -ra -from 101 -to 200 -ra 2
...
type 1 -materi -condif
group_materi_elasti_young 1 ...
group_materi_memory -updated
group_condif_conductivity 3 ...
...
type 2 -materi
group_materi_elasti_compressibility 2 ...
group_materi_viscosity 2 ...
group_materi_memory -updated_without_rotation
group_condif_conductivity 2 ...
...
Elements 0-100 are solids (with temperature) and elements 101-200 are fluids (with temperature).