Rooholamin Dargahi

10 Questions 18 Answers 0 Followers

Questions related from Rooholamin Dargahi

How to remove the remained solid after boolean?

I was trying to perform boolean remove to make a solid of the interior space of this muffler. To simulate the fluid passage inside this muffler I need to create a solid of its interior space...

04 August 2021 6,881 5 View

How to model and calculate Transmission Loss of a muffler in COMSOL for frequency range 1-10000?

Guys, I was seeing this video to know how COMSOL can calculate the Transmission Loss of a muffler https://www.youtube.com/watch?v=jrk_9SIn0aw but what about the frequency range between 1-10000?...

30 July 2021 8,109 3 View

Why are many researchs and papers on muffler design and optimization for frequency range between 1-3000Hz?

I was reading papers on muffler design and optimization and a question pupped up to me. Why are the frequency range for these researchs between...

30 July 2021 5,715 7 View

How to find/calculate the activation energy from this constant (in Arrhenius equation) ?

Guys, I've seen the Modified Arrhenius equation in several forms. For instance, three kinds are attached. Please consider the first attachment. There is an activation energy (Er). In some cases,...

22 September 2019 6,184 25 View

How to know a combustion is Detonation or transient or deflagration?

Let's assume somebody show you a combustion and ask you that what kind of combustion is it? How do you show that it's Detonation or Transient or Deflagration? I've read some stuff on the net,...

22 February 2019 4,758 4 View

How to know if a combustion is Turbulent or transient or laminar?

Guys, Is there any way to know if a combustion is Turbulent or transient or laminar? Please tell me how to know for the real combustion or numerical combustion we can show that what kind of...

22 February 2019 2,707 3 View

How to calculate the shock angle in a convergent conical duct(funnel duct)?

Guys, As you may know, you can calculate the shock angle of a cone using taylor-maccoll equation for any incoming flow with different Mach number but why there is no way to calculate the shock...

01 January 1970 3,428 1 View

Why do/es a residual/residuals start from a big non-zero magnitude sometimes?

Guys, Sometimes after initializing the problem in Fluent and triggering the calculate button, a residual/residuals start from a big non-zero magnitude. For instance, to me, it in many cases...

01 January 1970 9,606 11 View

How can I get the geometry and pressure or Mach or temperature distribution of an aircraft from an Aircraft manufacturers or other places?

Hello scientific world! I'm working on nozzle optimizing for aircraft jet engines, especially turbofan engines. I need to the engine nozzle geometry of an aircraft plus a parameter distribution...

01 January 1970 4,126 3 View

Is the nuclear explosion "detonation" or "deflagration"?

Guys, Always, I was (and also am) interested to know what kind of explosion is the nuclear explosion. "detonation" or "deflagration"? What do you think? This is a discussion then please feal free...

01 January 1970 1,470 4 View