Dear all,
I am currently doing my undergraduate final year project on gas flow dynamics of airbag. I am using LS-Dyna to simulate 3 different gas flow condition (uniform pressure, ALE and corpuscular).
I am able to obtain a simple model of airbag from LS-Prepost website. I am modifying it to learn more on ALE and corpuscular.
For ALE method,
The airbag that I simulated cannot inflate but when I plot ASCII file, there are changes in pressure and density of the control volume. But, there are no changes in the physical of the model (no displacement, no increase in volume). There are massless node error present.
For corpuscular method,
The airbag did not inflate though I can see particles emanating from the point source I selected. There are massless node error present.
Can anyone tell me why my airbag model is somehow frozen and cannot inflate ?
Can anyone tell me how massless node can happen?