All Questions
Tagged with fluid-dynamics or fluid-mechanics
1,287 questions
2 votes
1 answer
47 views
Optimal transition geometry between larger and smaller ducting
I was designing a filter which uses a much smaller fan than filter size. I am curious if there is a optimal way to transition between the smaller fan duct and the larger filter duct. Below I have have ...
- 121
1 vote
1 answer
74 views
Is there a standard flow diffuser design?
I have a 1" PVC pipe that outputs a tremendous amount of water (exact rate is hard for me to determine, but the pump it's connected to has a theoretical maximum output of ~1600 GPH) that I need ...
- 111
-1 votes
2 answers
71 views
Atmospheric Water generator system:" A different approach
This is my first question in stack exchange. This is a project which i am working with my friends. We are trying to build an AWG system by utilising Peltier coolers to cool an incoming pipe. So ...
- 3
0 votes
0 answers
47 views
Inlet/Outlet Vapor Nozzle Position Of Intercondenser
I am a process engineer at a nitric acid plant. One of our technicians recently asked me why the inlets and outlets of the steam ejectors are placed in middle of the intercondensers. I wasnt able to ...
0 votes
0 answers
77 views
How to aggregate local Darcy friction factor coefficients in non-straight pipe?
I would like to calculate the pressure drop and heat exchange coefficient across a non-straight and circular pipe filled with a fluid in forced convection using correlations for the friction factor ...
- 101
0 votes
2 answers
126 views
Designing adapter for 140 mm PC to 12,5 mm hose
I've designed a funnel that connects to a 140 mm fan on one end, and a 12.5 mm diameter hose on the other end. I want to use it to extract solder fumes. I have 3D printed this design, and tried it ...
- 1
1 vote
1 answer
58 views
How to measure Dynamic Pressure in a sprinkler valve set?
Currently within the UK Domestic Sprinkler Industry, we measure dynamic pressure using a standard static pressure gauge by throttling back the valve until we reach the required dynamic pressure in the ...
Gary
0 votes
1 answer
52 views
Process of building a turbojet
I want to make a turbojet but before the 3D design I have to get the calculations and I am having problems with compressor-turbine matching. My design for some context: single stage centrifugal ...
- 3
0 votes
1 answer
150 views
How to make a simple rotary viscous damper?
Simple questions, How much does the rotor shape matter? Will these simple designs work? Also, does the spacing between the rotor and the casing matter or is being submerged in oil just enough? Edit:So ...
- 1
0 votes
0 answers
40 views
If I have 60 psi air, how big would an "inflow radial turbine" need to be to produce 70 hp?
I need 70hp at 3000 rpm in an experimental aircraft. To reduce drag I'd like to put the engine in the fuselage, behind the pilot, and use wing-mounted props turned by small "inflow radial" ...
2 votes
1 answer
80 views
How can pumps on the same line regulate different physical values (flow and pressure) without counteracting each other?
In my line of work I sometimes see 2 or more pumps on the same line (for example during a transfer of liquid from 1 tank to another). One of the pumps regulates flow, the other one regulates pressure. ...
- 131
1 vote
2 answers
132 views
Water displaced above submerged submarine
When a submarine is at surface, its movement through water creates a wake of displaced water. Does the submarine when 20ft under water above its conning tower create wake turbulence? Ultimately, my ...
- 11
0 votes
2 answers
98 views
Tank structure with highest ratio of max gas mass to tank mass
For context, this is for a concept airship design. It would have a tank of compressed lifting gas and a compressor to regulate the pressure in the main envelope or air sacs without venting it, ...
1 vote
1 answer
125 views
Peltier dehumidifier connected via tubing to a small enclosure - fan type and size?
I'm trying to make a small 25 liter box with humidity control. I figured a TEC based dehumidifier would be adequately sized and I had some promising initial results some two years ago with a janky ...
- 11
1 vote
1 answer
113 views
Air compressor flow: input side or output side?
If a compressor is rated 10 CFM at 100 PSI, does that mean that 10 cubic feet of air at 100 PSI is generated (per minute) at the output? Or is the 10 cubic feet drawn in (at STP, say) on the input ...
- 11