Unanswered Questions
3,205 questions with no upvoted or accepted answers
20
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1
answer
473
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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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15
votes
1
answer
397
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Determining RTK parameters for runoff analysis
I am examining a watershed and determining runoff using the RTK method. I basically use a 'guess and check the hydrograph' method right now. I've seen calibrators that use a mutation and convergence ...
CommunityBot
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13
votes
1
answer
213
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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
0
answers
273
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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 ...
8
votes
1
answer
338
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System Dynamics Modeling
I am trying to model this system but am having difficulties in setting up the equations of motion. This is a simplified model of a motorcycle suspension system, where P is the ground in the image ...
CommunityBot
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8
votes
2
answers
989
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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
592
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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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185
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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
1
answer
138
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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
0
answers
19
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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?
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7
votes
2
answers
1k
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Calculation of the stored energy for a heat storage tank
There is a heat storage tank that is directly loaded from the top and the heat is also taken from the top.
The colder water from the heating circuit return flow enters the heat storage tank at the ...
CommunityBot
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7
votes
1
answer
146
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LED Lumen Calculations
I am using an LED as a point source for a school project. I have two questions in regards to the LED(s).
I know that light follows the inverse square law when measuring perceived brightness, but all ...
CommunityBot
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7
votes
1
answer
346
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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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