Hi again,
I am trying to understand how the setting of inlet in the FLUENT, specifically, the Velocity Magnitude and Direction. Someone could explain me, please?
I'm working in 3D domain.
you please follow the ansys fluent video on you tube...........
Hi Dong-Bin Kwak,
My doubt is how the fluent see the direction. Like, someone told me that I need to put the sin(alpha) to direction X, and cos(alpha) to direction Y. I am attaching a drawing of what I´m simulating.
In the drawing, there are 3 views. In the first, there is 3D view. In the second we can see a top view where the direction of the flow is normal to obstacle. And the third there is a top view of what I want to simulate. But, this wind profile also is variable with the hight. In resume, I need to vary the height, the angle and module of the wind.
Thank you for your attention,
Bianca Hulle
if your flow does not has any component in plane perpendicular to the flow axis then just simply apply sine cosine components to the velocity inlet(boundary condition) with respect to the inclination
Amit
Hi Amit, could you explain more about this?
In fact I just have a velocity and your direction. For an exemple:
Velocity: 8.2 m/s
Direction: 24°
Exactly like the drawing. But I dont know how use, correcty, sine and cosine componets. I was using the method Magnitude and Direction in inlet FLUENT (see the picture). But I dont know where put the height, sine and cosine there.
Some questions:
X,Y,Z component of flow direction: (what is this excetly ?)
Just to remember: Y is the height, X is the direction of flow and Z is the deep.
Thank you for your help, I am a new user yet, and there is no nothing good in the user guite FLUENT about this topic.
Dong-Bin Kwak,
- You mean you want to input wind velocity magnitude and direction varying with the height, right?
Yes, in attachment there is a table with the point I told you before. In each point there is a height, direction and module.
- First, Specifying the region (Rough/ Discrete input value):
Are you talking about in boudary conditions: Inlet>Method>Magnitude and Direction, am I right?
If was that, could you explain me the X,Y,Z component of flow direction? In each of those I use to set the height and each of those I set the direction?
I am sorry about a lot of questions, I am a new user.
Thank you again.
Amit,
U component?
And the height? Where will I set this parameter?
Bianca Hulle
Hello Dong-Bin Kwak ,
Really, you helped me alot!!!! I get it what do you did. I will do the same thing. I think this works very well.
Again, thank you!!!!
Hi Bianca
As I said in another thread, you're better to use UDF to have a smooth wind profile. It's very simpler than creating 37 different velocity inlet as boundary condition! however if you're interested to know more about wind profile equation and its coefficients and also compare your experiment data with the equation,I suggest to check the link below.
http://wind-data.ch/tools/profile.php?lng=en
Mahdi,
Thank you very much for your answer. I didn't know this link. Very interesting. Now, I am simulating a normal wind, again. But after that, I will come back this topic. For now, I'll let in standby this topic.
Hello, how can you put the velocity depending on the height (natural wind) in to the ANSYS? pls introduce me again! Thank you!
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