[jai]

I want to view massflow rate in the unit of kg/millisec in CFD-post. how can i do it? and
In pre i've given mass flow rate in kg/sec and i do a transient simulation for less than 1 second. now i want to know the total mass flow for the particular time period.

[mvoss]

Originally Posted by jai

I want to view massflow rate in the unit of kg/millisec in CFD-post. how can i do it? and
In pre i've given mass flow rate in kg/sec and i do a transient simulation for less than 1 second. now i want to know the total mass flow for the particular time period.

i am not quite sure if got you right, but total mass flow= rate*time so your given mass flow rate from pre is actually what you´re looking for.
Rate is rate, nomatter how long you calculate it. Just divide by 1000 and you end up with you kg/millisec.

neewbie

[jai]

how can i change the unit showing in post?
even through custom mode i can change to kg/sec, kg/hr and kg/min but i can't able to change into kg/millisec..

[mvoss]

hi,

1.create an expression like mymf=Fluid.Mass Flow
2.create an Variable mymf which is the expression mymf
AND here comes the trick
3.make a new variable which is a copy of mymf(variable) let´s say MassFlow
then rightclick over MassFlow --> edit in Command Editor and add a field like kg ms^-1 at the field User Unit.

I guess you could just do the second step (Frozen Copy of a Variable) since you probably already have something like Fluid.Mass Flow

neewbie

[jai]

Pls show me the screenshot of 3rd step if possible because i've not seen any user unit line there...
Pls ref the attached pic.

[mvoss]

i don´t know what your expression mf is like. anyways.
but i actually discovered that cfx will change the units back to kg/s, so you will have to change to not showing the units in the legend and than insert a textbox telling the corresponding unit (e.g. [kg/ms]).
for my way was working,... so im not sure why it isn´t the case for you.
neewbie