Editing Fiber simulation (section)

== Simulation techniques ==
Early fiber simulations employed particles which were rigid rods or prolate [[spheroids]], whose [[equation of motion|equations of motion]] have analytical solutions.  More recent models are able to represent flexible fibers. The models rely heavily on [[continuum mechanics]] concepts<ref>
{{cite book |last=Antman |first=Stuart S. |date=2005 |title=Nonlinear Problems of Elasticity |url=https://www.springer.com/de/book/9780387208800#otherversion=9780387276496 |publisher=Springer |isbn=978-0-387-27649-6|series=Applied Mathematical Sciences }}
</ref>  and the numerical methods employed have some similarities to those employed in [[molecular dynamics]], or in  dynamics of multi body systems.

The use of computers facilitates greatly the solution of fiber simulation problems. The complexity of the simulations arise from the system having a large number of [[degrees of freedom (physics and chemistry)|degrees of freedom]], and from the numerous possible interparticle interactions having place, such as [[friction]], hydrodynamic interactions, and other kinds of interparticle forces such as [[colloidal]] forces that exert attractive or repulsive forces.