Skip to main content
Engineering LibreTexts

6.1.4: Momentum Equation in Acceleration System

  • Page ID
    1223
  • [ "article:topic" ]

    For accelerate system, the right hand side has to include the following acceleration 
    \[ 
        \pmb{a}_{acc} =  
        \boldsymbol{\omega} \times \left( \pmb{r}\times \boldsymbol{\omega} \right) +  
        2\,\boldsymbol{U} \times \boldsymbol{\omega}  +  
        \pmb{r} \times \dot{\boldsymbol{\omega}} -  
        \pmb{a}_0  
        \label{mom:eq:accelartion} \tag{13}
    \]  
    Where \(\pmb{r}\) is the distance from the center of the frame of reference and the add force is 
    \[ 
        \pmb{F}_{add} =  \int_{V_{c.v.}} \pmb{a}_{acc} \,\rho\,dV  
        \label{mom:eq:addF} \tag{14}
    \] 

    Integral of Uniform Pressure on Body

    In this kind of calculations, it common to obtain a situation where one of the term will be an integral of the pressure over the body surface. This situation is a similar idea that was shown in Section . In this case the resulting force due to the pressure is zero to all directions.

    Contributors

    • Dr. Genick Bar-Meir. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or later or Potto license.