FLOW-3D 9.3 Convergence controls 一般填多少?

jackthree 厉害厉害

你说的问题倒没有注意过，你能不能把PREPIN传下都看看

F-PACKING coefficient 默认是1.0，我从不改这里，就收敛那里有时改到200才能完全填的满。

不是这里的问题，这里是收敛性的调节，你说的情况应该是在VOF里面的问题，在ADVANCED OPTIONS，里的F-PACKING coefficient这个数值，一般这个数值直接决定填充程度，你可试下的，如果在这里是1表示能充满，如果是0.6表示只填充60%，你自己可以调着看看效果，做个简单的模型很快就可看到的，前面你问的问题感觉不是这个问题》

我是用来分析铝合金压铸模的，默认是1的话，经常填充不满。但我改了20的话就填充满了，原来我一直都是错误的？默认1

填20

By default, the convergence criterion for pressure iterations, EPSI, is evaluated automatically during a calculation and printed out into the solver message, hd3msg, and solver summary, hd3out, files. This is the recommended option. Convergence can be tightened by defining a positive value of less than one in Numerics > Pressure solver options > Convergence controls > Multiplier for dynamically adjusted convergence criterion. It is not recommended to use a value larger than one.
默认是1，如果填写最好不要超过1
Steady-State Flow
An accelerated approach to a steady-state flow regime can be achieved by setting a large number, e.g., 1.0e6, for Numerics > Pressure solver options > Convergence controls > Multiplier for dynamically adjusted convergence criterion, and the Over-relaxation factor equal to 1.0. In that case no pressure iterations will be carried out since the convergence criterion is very large. Therefore, the transient solution, as the flow changes from the initial conditions to a steady-state flow, will not be accurate。This option can only be used for Confined Flows (one fluid, no sharp interface) with no heat transfer
如果是对于像一种在无自由液面的稳态流时这里的数据可以填的比较大些