All Questions
Tagged with computational-physics aerodynamics
15
questions
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35
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Add pressure gradient to Falkner-Skan (FS) boundary layer (BL) equations and solve numerically for arbitrary $P(x)$
I have read quite a few tutorials / watched several clips on the derivation of the Falkner-Skan boundary layer equations using similarity and then solution using RK solvers such as ...
- 21
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93
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How can I estimate the drag of a CAD model?
I have a CAD model that I’m trying to optimize for hydrodynamic-ness, programmatically (preferably with Python).
Is there a way I can find or estimate the drag force of the model, without having the ...
- 1
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251
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CFD Boundary condition: Pressure far field vs Pressure outlet
I’m confused about a Pressure far field and Pressure outlet boundary condition
Should I be using a pressure far field (for the ‘outlet’ of the computational grid) instead of pressure outlet?
Flow is ...
- 1
0
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28
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How to find equilibrium rpm of a wind-turbine / free-spinning rotor (using BEM)?
Background: I want to design a rotor-recovery system, which uses a free-spinning rotor to slow a fall instead of a parachute for example. From a mechanics and aerodynamic standpoint it should work ...
- 1
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157
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What boundary conditions are used to CFD simulate airflow over an aerofoil?
As I understand it, in CFD, a boundary is the geometrical surface around the system where you define the starting conditions for the simulation: For the analysis of fluid flow through a pipe a pipe ...
- 99
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38
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Finding aerodynamic coefficients of an airfoil using numerical data measured in wind tunnel
I am trying to find all the aerodynamic coefficients of an airfoil at different angles of attack. I have .DAT files for data which have 4 columns of data all in order {angle of attack[deg], Lift[N], ...
0
votes
1
answer
732
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3DOF Rocket Dynamics for an LQR controller
I'm trying to define a simplified model of a rocket to implement an LQ regulator. What I need is the translational dynamics on the earth's inertial frame and the rotational dynamics in the body frame. ...
0
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36
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Simulating Rotor Blades for Quadcopter
I would like to simulate various shapes for rotor blades that will be used in a quadcopter. Which simulation software is used to understand how shapes, rotation interacts with the surrounding air? I ...
- 137
2
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2
answers
3k
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Lift of an airfoil: viscous vs inviscid results
I am trying to understand the difference between the lift computed with an inviscid solver (Euler equations) and the one computed with a viscous solver(Navier Stokes equations).
At this point, I ...
- 23
1
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0
answers
54
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How is this equation obtained?
I'm trying to code a script to solve aerodynamics problems with different numerical methods. I'm analyzing one method, in which I'm particularly stuck because I need to obtain a velocity equation, but ...
- 51
1
vote
1
answer
594
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Most aerodynamic shape
What are the theoretical condition for a shape to be more aerodynamic?
How can you design an aerodynamic shape without any experiment,just with equations?
- 608
1
vote
1
answer
285
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Projectile Motion with Drag without Numerical Analysis
For a projectile on a horizontal plane, if given values for the angle of projection $\alpha$, the initial velocity $u$, some constant due to friction $k$ and an acceleration due to air resistance of:
$...
- 81
0
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1
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2k
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Reynolds number and characteristic length for a rectangular object in a pipe
I'm working on the problem of a steady 2-dimensional incompressible viscous flow through a straight delimited fluid pipe, in which a rectangular object is found,
This problem is aimed to be solved ...
- 738
1
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0
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39
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Plausibly looking fast numerical method for sails
I am looking for a cheap method to simulate aerodynamics of sail plans.
This is for a game, so it does not have to be very accurate, but should be realistic enough so that professional sailors would ...
- 111
2
votes
1
answer
3k
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How to plot Joukowski airfoil?
We have an asymmetric potential flow past the cylinder (i.e. 2D circle) of radius $R$ of well-known complex velocity $W$:
$$
\tilde{W} = v_\infty e^{-i\alpha} + i\frac{\Gamma}{2\pi(\zeta - \mu)} - \...
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