Resistance

Navigation:  Modeling Tutorial > Bond Graphs > Standard Elements >

Resistance

Previous pageReturn to chapter overviewNext page

A resistance, R, dissipates free energy. This energy of any arbitrary domain is transported irreversibly to the thermal domain. This means the power towards a resistance is always positive. In the table below the effort and flow description of the resistance is shown. Examples of a resistance are a mechanical damper and an electrical resistor.

 

R-element

bond graph element

equation

effort-in causality

REementEffortIn

f = (1/R) e

effort-out causality

REementEffortOut

e = R f

 

The direction of effort and flow is not restricted for a resistance and there is no preferred form for the equation. In other words: the R-element has a indifferent causality.