Unanswered Questions
4,122 questions with no upvoted or accepted answers
20
votes
2
answers
521
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Is there a method to determine the runoff for arid areas in developing countries?
Note: this question was totally rephrased and expanded on, addressing the comments and questions posed to the first version.
The de-facto standard source for runoff calculations in South Africa is ...
CommunityBot
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13
votes
2
answers
254
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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
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10
votes
0
answers
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 ...
9
votes
1
answer
340
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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 ...
CommunityBot
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8
votes
2
answers
479
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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
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8
votes
2
answers
1k
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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
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8
votes
0
answers
637
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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 ...
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8
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0
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201
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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 ...
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8
votes
2
answers
492
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On a Diesel/hydraulic DMU train what exactly does the “go faster” lever control?
Let's say that you are driving a Diesel Multiple Unit† with either mechanical* (i.e. an actual gearbox with multiple ratios) or hydraulic (i.e. two or more torque converters) transmission. When you ...
CommunityBot
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8
votes
1
answer
154
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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
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8
votes
0
answers
7k
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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 ...
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7
votes
1
answer
48
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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
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7
votes
3
answers
452
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Questions regarding Cornering Stiffness for RC Car
I am a bachelor's level student tasked with modeling the vehicle dynamics of an RC Car that will be made to drive autonomously. I lack prior experience or particularly specific education with vehicle ...
CommunityBot
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7
votes
2
answers
578
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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
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7
votes
3
answers
7k
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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
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