Unanswered Questions
4,951 questions with no upvoted or accepted answers
Score of 14
14
votes
3 answers
3
answers
415 views
415
views
How do the bubble oscillations in two-phase flows affect the dissipation rate of turbulent kinetic energy?
I am investigating the effects of bubble oscillations (calculated using the Rayleigh-Plesset equation for bubble dynamics) on the turbulence in two-phase flows. Since I am using cryogenic fluids, the ...
CommunityBot
- 1 reputation score 1
Score of 10
10
votes
3 answers
3
answers
528 views
528
views
Forcing a part into "home position"
I have a design with two parts (at the moment):
a fixed 10cm ring with vertical tracks
a freely rotating block with a cut that may freely slide along that tracks:
I'm trying to find a low profile way ...
CommunityBot
- 1 reputation score 1
Score of 10
10
votes
0 answers
0
answers
1477 views
1k
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ANSYS APDL Shape memory effect option of SMA not working
I am trying to define the material properties of a shape memory alloy material in ANSYS APDL V15. There are material properties for Superelastic materials (SUPE option) and material properties for ...
CommunityBot
- 1 reputation score 1
Score of 8
8
votes
2 answers
2
answers
1102 views
1k
views
Deriving the amplitude of a coulomb (dry friction) damped spring
This is my first time posting anything, but I could not figure out the derivation of the amplitude of the spring for the 4 first oscillations. I am not acquainted with the effect and calculations of ...
CommunityBot
- 1 reputation score 1
Score of 8
8
votes
3 answers
3
answers
1593 views
2k
views
Design of transverse reinforcement in a wide beam
Besides satisfying nominal bar provision in the code, is there any special requirement in the provision of transverse reinforcement to ensure that the longitudinal reinforcement is fully effective in ...
CommunityBot
- 1 reputation score 1
Score of 8
8
votes
0 answers
0
answers
794 views
794
views
Incompressible 2D pressure-driven flow: for Navier-Stokes equations in nondimensional form, how should I express pressure boundary conditions?
*I have updated this question.
I'm using two codes for modeling incompressible, two-dimensional flow out of a tank. My fluid dynamics experience is pretty basic; I'm using the codes to understand a ...
CommunityBot
- 1 reputation score 1
Score of 8
8
votes
0 answers
0
answers
251 views
251
views
Sketching an engineering system in healthcare
I am about to do a project about engineering systems in a Systems Engineering course.
I need to sketch an engineering system in which clinical decision support systems are being used to diagnose ...
- 1,064 reputation score 1064
Score of 8
8
votes
1 answer
1
answer
193 views
193
views
How can I estimate blocking window distance in an sCMOS sensor setup?
I am trying to establish an appropriate distance between a spectrograph output window and a CMOS sensor.
The spectrograph creates a focused image on the CMOS sensor but I am trying to restrict the ...
CommunityBot
- 1 reputation score 1
Score of 8
8
votes
0 answers
0
answers
7565 views
8k
views
Residuals of continuity not converging
I'm simulating a turbine.
The convergence of solution is monitored by checking the residuals of the numerically solved governing equations.
The "viscous-spalarat-almaras" model is used, and used air ...
- 899 reputation score 899
Score of 8
8
votes
1 answer
1
answer
891 views
891
views
(Non)simultaneous prestressing anchorage slip losses
Post-tensioned prestressed concrete beams suffer from a multitude of losses. When jacked, they suffer friction losses and their tension diagram is, for example (to simplify the drawing, I'm using the ...
- 13.2k reputation score 13177
Score of 7
7
votes
0 answers
0
answers
107 views
107
views
Why did paper bag “notch” switch sides?
This question requires a little bit of prior knowledge, so bear with me as we review.
Historical Context
Way back in the 1990s the idea that paper bags were destroying the earth became vogue and ...
- 1 reputation score 1
Score of 7
7
votes
2 answers
2
answers
116 views
116
views
What types of materials can be tested in a split Hopkinson pressure bar?
A split Hopkinson pressure bar can test different types of specimens, I would like to know what types of materials that are suitable to be tested with this method?
CommunityBot
- 1 reputation score 1
Score of 7
7
votes
1 answer
1
answer
311 views
311
views
I have a problem with my representation of roll in Simulink
I am currently an engineering student and a member of the aerospace club of my engineering school (ESILV) which is called LéoFly. We’re a team of 12 students and are building a Fusex (...
CommunityBot
- 1 reputation score 1
Score of 7
7
votes
2 answers
2
answers
956 views
956
views
Industry standard factor of safety for ballast design
What design standards exist for the design of ballast against uplift forces, and what factor of safety against uplift do these design standards promulgate? I am familiar with a typical FS of roughly 1....
CommunityBot
- 1 reputation score 1
Score of 7
7
votes
3 answers
3
answers
7899 views
8k
views
How to find press fit/ slip fit for non standard size parts?
I am looking for calculator or chart for slip fit and press fit for non standard size parts.
For example, I have oversized dowel pin 10mm +0.03/+0.01 diameter. I need to create a slip fit hole for ...
CommunityBot
- 1 reputation score 1