Jet fan

ali.soufan · October 31, 2015, 16:32

Hello everyone,

I need to understand how can i done a jet fan in ansys 14.0 using fluid flow fluent so i can done my carpark project, Is there any tutorial let me understand this any help? post me a link of this tutorial if it available please.

Thank you

Jeeloong · October 31, 2015, 17:52

Ali,

Are you simulating air through rotating fan? or air through carpark?

You can put constant velocity or mass flow rate into the carpark.

One way is to make straight pipe where the flow is being developed. Then save the velocity profile and input into the carpark inlet.

Thanks

Hope that help.

ali.soufan · October 31, 2015, 18:19

Jeelonog,
I am simulating air through carpark, i need to put jetfan in this carpark so i tried to draw a cylinder that will act as a jetfan but what i got that the flow doesn't effect the interior of carpark the flow remains inside the cylinder.
Any help i tried alot but it doesn't work same result.
Thanks for your time

ali.soufan · October 31, 2015, 18:39

ImageUploadedByCFD Online Forum1446334185.889556.jpg
I am trying to make a jet fan for my carpark project so i am trying it on a small room and after i will put it on my carpark when it works.
As you can see in the picture cylinder in middle of the room is the jet fan but as you can see it didn't act as jetfan the velocity of room didn't change,so how can i let this cylinder act as a jet fan any help please
Thank you

Jeeloong · October 31, 2015, 18:46

Hi Ali,

Is your jetfan connected to the carpark as a whole? Is there a surface that block it from entering? You can set it into Interior. Check your mesh.
Try include a picture for description

Thanks

Kind Regards,
Jee Loong

Jeeloong · October 31, 2015, 18:47

Do remember to check the scale of your mesh,

It could be at situation where your mesh is let say 1000m instead of say 10m.

Scaling can be done in Fluent in first few tab I guess

ali.soufan · October 31, 2015, 18:50

I post a new thread jet fan problem with a picture of the the room that i am trying th jet fan on it

ali.soufan · October 31, 2015, 18:59

ImageUploadedByCFD Online Forum1446335913.373924.jpg
This is the room it is clear for you.
How can i let this cylinder act as a jetfan?

ali.soufan · October 31, 2015, 19:22

ImageUploadedByCFD Online Forum1446336819.035603.jpg
This is all room details not more i am taking default numbers in boundary condition and i am generating energy equation, species and turbulence k-E in the model. it is only an case study to know if the the cylinder in the middle of the room will act as a jetfan.

Jeeloong · November 1, 2015, 17:20

Hi Ali,

If you want the flow to enter in a devloped form make a long long cylinder and run the air flow once it exit ur jetfan it should has the form of turbulence since the wall bounded condition no holder holds. By the way what is the CO?

Thanks

Kind regards,
Jee Loong

Jeeloong · November 1, 2015, 17:21

Also make sure your velocity magnitude of jetfan is in the correct magnitude and direction otherwise it didnt exit the system.

ali.soufan · November 2, 2015, 18:07

ImageUploadedByCFD Online Forum1446505069.486471.jpg
Hi jee,
Thanks for your information.
In this photo i showed you my jet fan simple, but i am confused in boundary condition specification so in the jet fan inlet and outlet where the ? Shown in picture, what should I specify this 2 faces in boundary condition?
And the interior of jet fan should i keep it interior or what? I have many choices (fan, porous-jump, radiator, wall).
Thank you for your time,
Best regards,

October 31, 2015, 16:32	Jet fan	#1
ali.soufan New Member Join Date: Mar 2015 Posts: 22 Rep Power: 11	Hello everyone, I need to understand how can i done a jet fan in ansys 14.0 using fluid flow fluent so i can done my carpark project, Is there any tutorial let me understand this any help? post me a link of this tutorial if it available please. Thank you

October 31, 2015, 18:39	Jet fan problem	#4
ali.soufan New Member Join Date: Mar 2015 Posts: 22 Rep Power: 11	ImageUploadedByCFD Online Forum1446334185.889556.jpg I am trying to make a jet fan for my carpark project so i am trying it on a small room and after i will put it on my carpark when it works. As you can see in the picture cylinder in middle of the room is the jet fan but as you can see it didn't act as jetfan the velocity of room didn't change,so how can i let this cylinder act as a jet fan any help please Thank you

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October 31, 2015, 17:52		#2
Jeeloong Member Join Date: Jan 2015 Location: United Kingdom Posts: 53 Rep Power: 11	Ali, Are you simulating air through rotating fan? or air through carpark? You can put constant velocity or mass flow rate into the carpark. One way is to make straight pipe where the flow is being developed. Then save the velocity profile and input into the carpark inlet. Thanks Hope that help.

October 31, 2015, 18:19		#3
ali.soufan New Member Join Date: Mar 2015 Posts: 22 Rep Power: 11	Jeelonog, I am simulating air through carpark, i need to put jetfan in this carpark so i tried to draw a cylinder that will act as a jetfan but what i got that the flow doesn't effect the interior of carpark the flow remains inside the cylinder. Any help i tried alot but it doesn't work same result. Thanks for your time

October 31, 2015, 18:46		#5
Jeeloong Member Join Date: Jan 2015 Location: United Kingdom Posts: 53 Rep Power: 11	Hi Ali, Is your jetfan connected to the carpark as a whole? Is there a surface that block it from entering? You can set it into Interior. Check your mesh. Try include a picture for description Thanks Kind Regards, Jee Loong

October 31, 2015, 18:47		#6
Jeeloong Member Join Date: Jan 2015 Location: United Kingdom Posts: 53 Rep Power: 11	Do remember to check the scale of your mesh, It could be at situation where your mesh is let say 1000m instead of say 10m. Scaling can be done in Fluent in first few tab I guess

October 31, 2015, 18:50		#7
ali.soufan New Member Join Date: Mar 2015 Posts: 22 Rep Power: 11	I post a new thread jet fan problem with a picture of the the room that i am trying th jet fan on it

October 31, 2015, 18:59		#8
ali.soufan New Member Join Date: Mar 2015 Posts: 22 Rep Power: 11	ImageUploadedByCFD Online Forum1446335913.373924.jpg This is the room it is clear for you. How can i let this cylinder act as a jetfan?

October 31, 2015, 19:22		#9
ali.soufan New Member Join Date: Mar 2015 Posts: 22 Rep Power: 11	ImageUploadedByCFD Online Forum1446336819.035603.jpg This is all room details not more i am taking default numbers in boundary condition and i am generating energy equation, species and turbulence k-E in the model. it is only an case study to know if the the cylinder in the middle of the room will act as a jetfan.

November 1, 2015, 17:21		#11
Jeeloong Member Join Date: Jan 2015 Location: United Kingdom Posts: 53 Rep Power: 11	Also make sure your velocity magnitude of jetfan is in the correct magnitude and direction otherwise it didnt exit the system.

November 2, 2015, 18:07		#12
ali.soufan New Member Join Date: Mar 2015 Posts: 22 Rep Power: 11	ImageUploadedByCFD Online Forum1446505069.486471.jpg Hi jee, Thanks for your information. In this photo i showed you my jet fan simple, but i am confused in boundary condition specification so in the jet fan inlet and outlet where the ? Shown in picture, what should I specify this 2 faces in boundary condition? And the interior of jet fan should i keep it interior or what? I have many choices (fan, porous-jump, radiator, wall). Thank you for your time, Best regards,