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August 26, 2019 at 7:32 pm
manjuk
SubscriberI'm sorry, but I'm having the same issue I was having before where I try to create a discussion, but it keeps saying "Access Denied".
Can someone please help me create a discussion in the Fluid Dynamics category?
Thank you.
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August 28, 2019 at 12:29 pm
Rob
Ansys EmployeeIT are looking at some problems (again), if you create the thread in here I'll move it later.
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September 2, 2019 at 7:59 am
stac
Subscriberi am faceing the same issue
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September 2, 2019 at 11:01 am
Rob
Ansys EmployeeRestart the browser and check in a different browser. The original problem has been corrected, so let me know if that doesn't work.
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September 2, 2019 at 9:40 pm
manjuk
SubscriberOkay thanks everyone, I’ll try again later. -
September 2, 2019 at 10:14 pm
manjuk
SubscriberUpdate: I'm sorry, I'm still having the same issue.
I've tried it on Microsoft Edge and Google Chrome.
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September 3, 2019 at 5:00 am
DrAmine
Ansys EmployeeSome posts require to be reviewed by Admins so be patient. Some of us are sleeping at nights. -
September 3, 2019 at 9:24 am
Rob
Ansys EmployeeThere's nothing in the moderation queue, and I can't see any other posts from Manjuk so something weird is going on. I can't see anything on your user ID so don't think it's us. Assuming you've done the reboots etc and checked for pop up blockers create the post here and I'll move it later. Make sure it's clear where I need to put it!
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September 4, 2019 at 5:08 am
manjuk
SubscriberThank you.
Unfortunately, when I try to post it here, it's not posting for some reason. I'm not even getting an "awaiting moderation" message that I usually get. Could it possibly be because it's too long?
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September 4, 2019 at 8:38 am
Rob
Ansys EmployeeCould be, we don't mind several shortish posts to outline a problem, just add a note in the original post to explain. Your message from this morning (my time) was in the moderation queue, and it's likely I'll have to approve this one too....
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September 4, 2019 at 11:54 am
Vishal Ganore
Ansys EmployeeI could see that you can reply to this post. Would you post your next discussion text here? Are you copying text from somewhere else or typing in the editor?
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September 4, 2019 at 8:03 pm
manjuk
SubscriberI'm copying from a Word document. I will try several different posts here to see if it goes through.
Title: Fluent - Issues with Boundary Conditions
Category: Physics Simulation - Fluid Dynamics
Tag: FLUENT
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September 4, 2019 at 8:03 pm
manjuk
Subscriber"I'm trying to simulate a steady, 2D, internal, compressible flow through a channel. I have a pressure inlet (the flow is compressible so I can't use a velocity inlet) and a pressure outlet."
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September 4, 2019 at 8:03 pm
manjuk
Subscriber"For the pressure inlet, the Reference Frame is Absolute, the Gauge Total Pressure is 691485 Pa, the Supersonic/Initial Gauge Pressure is 0 Pa (simulating a Mach number of 2), the Direction Specification Method is Normal to Boundary, Prevent Reverse Flow is checked, and the Total Temperature is 518.67 K."
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September 4, 2019 at 8:04 pm
manjuk
Subscriber"For the pressure outlet, the Backflow Reference Frame is Absolute, the Gauge Pressure is 606174 Pa, the Pressure Profile Multiplier is 1, the Backflow Direction Specification Method is Normal to Boundary, the Backflow Pressure Specification is Static Pressure, the Average Pressure Specification Averaging Method is Weak, the Target Mass Flow Rate is 669.09 kg/s (the upper and lower limits of absolute pressure are 5000000 and 1 Pa respectively), and 518.67 K."
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September 4, 2019 at 8:05 pm
manjuk
Subscriber"My problem is that when I try running the calculations, when I check the contours, the inlet boundary conditions seem to be completely ignored by FLUENT. For example, the pressure is way too high and the velocity is way too low. I believe this is due to the fact that my initial values are much closer to the outlet values, but this is because if they're too close to the inlet values (or even somewhere in the middle), then my residuals explode really quickly. They still explode even if the initial values are closer to the outlet values, but not until much later. How would you suggest I initialize this? Should I try patching different initial values at the inlet, outlet, and in the middle?
Any help would be greatly appreciated."
These are all different paragraphs for the same post. Thanks to everyone who's been helping me out!
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September 5, 2019 at 6:50 am
Vishal Ganore
Ansys Employee"For the pressure inlet, the Reference Frame is Absolute, the Gauge Total Pressure is 691485 Pa, the Supersonic/Initial Gauge Pressure is 0 Pa (simulating a Mach number of 2), the Direction Specification Method is Normal to Boundary, Prevent Reverse Flow is checked, and the Total Temperature is 518.67 K."
"For the pressure outlet, the Backflow Reference Frame is Absolute, the Gauge Pressure is 606174 Pa, the Pressure Profile Multiplier is 1, the Backflow Direction Specification Method is Normal to Boundary, the Backflow Pressure Specification is Static Pressure, the Average Pressure Specification Averaging Method is Weak, the Target Mass Flow Rate is 669.09 kg/s (the upper and lower limits of absolute pressure are 5000000 and 1 Pa respectively), and 518.67 K."
"My problem is that when I try running the calculations, when I check the contours, the inlet boundary conditions seem to be completely ignored by FLUENT. For example, the pressure is way too high and the velocity is way too low. I believe this is due to the fact that my initial values are much closer to the outlet values, but this is because if they're too close to the inlet values [or even somewhere in the middle], then my residuals explode really quickly. They still explode even if the initial values are closer to the outlet values, but not until much later. How would you suggest I initialize this? Should I try patching different initial values at the inlet, outlet, and in the middle?
Any help would be greatly appreciated."
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September 5, 2019 at 6:54 am
Vishal Ganore
Ansys EmployeeDear Friend,
As you can see above, I have changed curved bracket to rectangular for "[or even somewhere in the middle]," and it worked. Our text editor is sometimes sensitive to coding loop words with brackets. It is a bug that we are trying to remove.
Meanwhile, please go ahead and create a new post with a rectangular bracket, remove formating if any. It should work.
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September 10, 2019 at 5:12 am
manjuk
SubscriberThank you Vishal Ganore. I will try that.
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