Learning Forum

[Merve Ala]

I wanna analyse a sloshing caused by sudden braking of a truck traveling at 20m/s.  Like the videos on YouTube, I use VOF method and Piso solver. Unlike videos, I wrote that equation of gravitational X acceleration IF(t<=1[s],20 [m/s^2],0[m/s^2]) . It means the truck velocity starts from 20 m/s at t=0 and it breaks until 1sec. Then ıt's velocity is 0. And Y acceleration -9.81 Z acceleration is 0.

But ın the 0.49 flow time I get this result. Sloshing shouldn't be like this. Did I miss somethings?

 

 

[Rob]

What are the two fluids? What is the y-direction gravity value? 

[Merve Ala]

Water and air. Air is primary water is secondary phase. Gravity is Y acceleration -9.81

[Rob]

OK, and why wouldn't the water try and flow to the bottom half of the tank? 

[Merve Ala]

That's what I am asking. 

[Rob]

Look at the force vectors. You have an x-force and a y-force. What is the resultant force vector?