hi jack, let's take a step back
1. do you want to perform and internal or external analysis?
2. what is the inlet to your model? how did you apply it?
3. what is your outlet? how did you apply it?
if you're performing an internal analysis and you have a fan, usually people have an external outlet fan or external inlet fan with a fan curve specified. or they use a volume flow rate. the pressure is usually environmental because that is what is on the other side of the fan.
then on the other end, they have environmental pressure applied to tell the software where the air leaves. set it to atmosphere.
if you have 2 pressures specified, you're forcing the direction and flow rate.
At first thank for your answer
2.and 3.in this picture
For ansysis the notebook's Cpu and Gpu cooling.
i choose the Centrifugal fan for work the air ,so that the air have pressure drop
i have double inlet hole,so i choose inside faces with environment 10332.2745mmH2O,and outlet hole with environment10332.2745+8.3
I see the video,it teatch choose insert-fan,three types ,but i don't know what i choose?Radial?fan curve?
So i use another way,use" Rotating Region" with 3600rpm,"inlet" "outlet",and "real wall"
I choose real wall,because the air will throught in the box,the air will contact Gpu,Cpu,hot sink,mother board,
I had been buy "An Introduction to SolidWorks Flow Simulation 2012" John E. Matsson, Ph.D.,but it not help for me
I am very disappointed for that,there is no similar example can learn
Could you help me? Introduction some handbook about use fan for cooling the Electronic Devices
I'm verry appreciation for you answer my questions,Thanks
i would take a step back
build a box with a hole in it
fill that hole with a part
cut another hole fill it with a part
for the first hole, apply a fan curve to it so you can see how it works
on the other hole, make it an environmental pressure
i would recommend getting the hang of this before you move onto a rotating region. this is only necessary if you are designing the fan blades.
if you're using a centrifugal fan, why not use the radial fan option?
I have big Problem.............
is not laying on the boundary between solid and fluid region.
this Problem is very usually happrn,i saw the web,and i check Geometry and Interference
you can see the Interference created by rotation area,but is not importment
may be you will say the modle is not a cavity ,but i very shure it is a cavity
hi, i would recommend checking this article:
you don't have a closed volume so internal analysis won't work.
i would recommend you start smaller and with a sample part. in this case you probably have an interference between components that is causing a problem.
at first ,thank for your answer ,i find the right ways
but now i still suffer big problem
all of the set can be run,so my Geometry is right
i saw yor answer another people,if you can tue the boundary condiction,
at first that you can run and withresult
but this problem ,i can not generation mesh at the begin
suggest suppressing all components except for the outside components, see if it works
then add another part, see if it works
this will help you identify which part is the problem
you are so smart
I try it ,thanks
thanks i find the problem
This problem is happen in the rotation area..
my rotanon area is an Assembliesn,it consider fan and with solid rotation area
at first ,the rotation area is solid ,but the solideworks do't let me mesh the mold
but when i use Molding,which the solid have some empty places with the fan ,
and then the mesh can be run ,it so amazy,do you know why??
I'm verry happy when it succeed,but i wound know why?
Thanks,in this day you help so mutch
This flow simulation ,is your creating ?
Going back to some initial comments, unless you are designing the fan, a rotating region is overkill and there are several rules you need to follow to get good results.
For your problem, it sounds like you come from another cfd software. In flow you model the impeller and then a simple revolve that is solid for the rotating region. No cavity function or subjection.
I would recommend taking a look at the solving engineering problems document if you want to go this way.
At first thanks, for your answer
I am a student now,my project is "backward curved centrifugal fan"
I want to discuss about "rotational area" with you
Whe you see the picture,you will found that the rotational area is not complete contain the fan,the left side
In general teaching movie,it just only tell write a solid cylinder,but it's inaccurate
This is my fan model,and this is my rotational area,i use Rotating packed
And it is impossible complete contain the fan, without the rotation area just match than fan ,it means, it
must bigger than fan
This result can't be accepted,because this fan is very tiny,it only 60mm
So i hople you teatch me the skill ,that can write the rotation area just match with my fan
Please tell me the answer,or give me some suggestion
Thank you very mutch!!!
Just make the rotational region bigger and apply a stator to the walls in your model. Tho discovered in the tutorials and the training class and more info in The tech reference.