# Rate of stress versus velocity gradient

1. Feb 24, 2010

### maros522

Hello,
I don't understand the meaning of equation
$$\int\dot{s}_{ij}\frac{\partial v_{j}}{\partial x_{i}}$$ dV
where $$\dot{s}$$ is rate of change of stress, $$v_{j}$$ is velocity.

Can anybody describe the meaning of this equation? Thank you.

Last edited: Feb 24, 2010
2. Feb 28, 2010

### vargasjc

I don't remember that equation. vj is the velocity of the element under stress? What's V (on dV)?

3. Feb 28, 2010