Actuator Disk/ Depressure Source

Zephiro88 · March 31, 2015, 04:58

Hi,
i need to simulate the effect of a boundary layer ingestion. So i need to simulate the suction effect of the engine and the jet velocity, but i don't care about the engine performance.
I "simply" need to tell that there is a suction area in the intake and a blowing area in the exhaust.
I look at both fvOptions and cerateBaffle, but i did not understand how work.
I have to create the geometry of the disk wall in the stl or i can simply define it in the fvOption/crateBaffel dict?
Wich ones of the two method is better for my purpose?

icaroaccordi · March 31, 2015, 06:55

Use fixedJumpAMI or fixedJump.

Zephiro88 · March 31, 2015, 08:23

Can you tell me how use it?

icaroaccordi · March 31, 2015, 08:52

Use it in the high pressure patch p dictionay:
highPressureSide
{
type fixedJumpAMI;// or fixedJump for conforrmal cyclic patches
patchType cyclic;
jump uniform 10;// (pressure/rho) jump for incompressible
}

And it for the another patch (low pressure) in p dictionary:
lowPressureSide
{
type cyclicAMI;// or just cyclic for conforrmal cyclic patches
}

All other variables (e.g.U, k, epsilon, omega, etc) are setting in both patches as :

highPressureSide
{
type cyclicAMI;// or just cyclic for conforrmal cyclic patches
}

lowPressureSide
{
type cyclicAMI;// or just cyclic for conforrmal cyclic patches
}

Zephiro88 · March 31, 2015, 10:07

I'm more noob than you think...
I only know how to run a simpleFoam ofa wing or other static and simple body.
I took an stl file and put in SHM..
How can i introduce the "fan"
I have to create the fan surface in the stl file or it could be assigned with some dictionary?
I don't know if you understand me, my english level is low..

March 31, 2015, 04:58	Actuator Disk/ Depressure Source	#1
Zephiro88 New Member Francesco Join Date: Jul 2014 Posts: 26 Rep Power: 11	Hi, i need to simulate the effect of a boundary layer ingestion. So i need to simulate the suction effect of the engine and the jet velocity, but i don't care about the engine performance. I "simply" need to tell that there is a suction area in the intake and a blowing area in the exhaust. I look at both fvOptions and cerateBaffle, but i did not understand how work. I have to create the geometry of the disk wall in the stl or i can simply define it in the fvOption/crateBaffel dict? Wich ones of the two method is better for my purpose?

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March 31, 2015, 06:55		#2
icaroaccordi Member Icaro A. Accordi Join Date: Oct 2010 Posts: 31 Rep Power: 15	Use fixedJumpAMI or fixedJump.

March 31, 2015, 08:23		#3
Zephiro88 New Member Francesco Join Date: Jul 2014 Posts: 26 Rep Power: 11	Can you tell me how use it?

March 31, 2015, 08:52		#4
icaroaccordi Member Icaro A. Accordi Join Date: Oct 2010 Posts: 31 Rep Power: 15	Use it in the high pressure patch p dictionay: highPressureSide { type fixedJumpAMI;// or fixedJump for conforrmal cyclic patches patchType cyclic; jump uniform 10;// (pressure/rho) jump for incompressible } And it for the another patch (low pressure) in p dictionary: lowPressureSide { type cyclicAMI;// or just cyclic for conforrmal cyclic patches } All other variables (e.g.U, k, epsilon, omega, etc) are setting in both patches as : highPressureSide { type cyclicAMI;// or just cyclic for conforrmal cyclic patches } lowPressureSide { type cyclicAMI;// or just cyclic for conforrmal cyclic patches }

March 31, 2015, 10:07		#5
Zephiro88 New Member Francesco Join Date: Jul 2014 Posts: 26 Rep Power: 11	I'm more noob than you think... I only know how to run a simpleFoam ofa wing or other static and simple body. I took an stl file and put in SHM.. How can i introduce the "fan" I have to create the fan surface in the stl file or it could be assigned with some dictionary? I don't know if you understand me, my english level is low..