Abbas Majidi Bidgoli

8 Questions 21 Answers 0 Followers

Questions related from Abbas Majidi Bidgoli

What are all types of gas sampling valves?

Hello, in gas chromatography, 6,8 or 10 ports valve are used. how many mechanisms exist for the valves function? I know that one of them is diaphragm based chromatographic valves. I want to find...

03 September 2018 1,961 3 View

How do I make a Hydrogen generator cell based on water electrolysis?

Hello I want to start making a Hydrogen generator cell based on water electrolysis(PEM). Except Reversible Fuel Cell MEA - 3 Layer and two GDLs (Toray Carbon Paper 120 Wet Proofed(from Fuel...

01 August 2018 8,676 7 View

How do I add time dependence variable in COMSOL?

Hello I want to add a time dependence external force such as a pulse into my model in comsol. How do I add this? in general, How can I add a time dependence variable or dipole(for example) in a...

02 August 2016 3,000 3 View

What is the vibrational level n probability in thermodynamics equilibrium condition?

Hello for a diatomic gas in thermodynamics equilibrium, what is the vibrational level n probability? is below equation correct? P(vibration level n probability)=(1/Total Partition...

29 July 2016 4,597 2 View

Why don't we consider electronic level of molecule as degree of freedom such as vibration and rotation?

Hello we know a nonlinear molecule has 3N degree of freedoms. 3 are translational, 3 are rotational and 3N-6 are vibrational degree of freedoms. but The molecule has another degree of freedoms to...

28 July 2016 7,506 4 View

Is there a simple explanation of Hollow Cathode Effect?

Hello I am searching for a simple explanation for Hollow Cathode Effect. I find some references but Im confused.what happen in a Hollow Cathode which can increases the current in glow discharges?I...

25 June 2016 7,005 8 View

What is the physical reason for anode potential drop in low-pressure glow discharges?

Hello In low-pressure glow discharges, two regions which are close to electrodes have relatively stronge electrical field and potential drops occur in this two regions. What is the physical reason...

24 May 2016 4,310 6 View

Can I produce standing wave in a cavity which has one side smaller than half of wavelength?

Hello I have a cavity which is shown in below picture. Does a acoustic wave with wavelength >2×L have standing wave in the cavity? Does diffraction limitation allow the cavity has stranding...

26 October 2015 4,566 15 View