Cfd Definition and 133 Threads

I am thinking about a single run in a typical Bell-type scenario: A joint-measurement of an (appropriately prepared) entangled property is performed in spacetime regions A and B at spacelike separation. Regarding the above, in conjunction with Quantum Theory, would you say the following...

In standard Bohmian Mechanics, does the pilot wave support counterfactual definiteness? How about other variants of BM, don't they? Can you mention or bring up a site that summarize all variants of BH and whether the pilot wave in each support counterfactual definiteness. Thank you.

Hello, Python,CFD and PF newbie here. I am using Spyder (Python 3.5) and I managed to plot my streamfunction in cartesian coordinates. I tried transforming and plotting in polar coordinates but I am not sure that what i have done is correct. I am not even sure what the plot should look like :/...

Hello, I was doing melting and solidification of ice kept inside a annular cylinder. The temperature of inside wall of cylinder is 80 degree. Now i want to analyse the total time consuming to melt the ice and plot temperature variation with time. Actually i did analysis but the result i found...

Hey Guys, I want to verify the exhuast design of a car park ventilation system on Ansys Fluent. Basically, I have jet fans distributed throughout the parking displacing air towards a certain point where I will extract it . How would you go about modeling the boundary conditions in this...

When I took such courses I suffered due to the fact that I could not code/program. My friends and professors knew how to make 1-D or 2-D grids for heat transfer problems, writing calculus formulas and differential equations in code. How can I learn this? I already know how to solve these...

What is the "plane of symmetry", "zero velocity wall" and "free surface" terms which I have seen in Polyflow? It says in Vnormal=Fs=0 for plane of symmetry and Vnormal= Vs= 0 for zero velocity Wall. Now I get when Vs=Vn=0 it means that the wall isn't moving and it's in a static state but didnt...

I have come across the paper attached in which a 1D fluid piston is modeled. I have question on the boundary conditions (BCs) of the system. Essentially, the problem consists of a fluid chamber in contact with a spring (a mass -spring system). ALE is used to move the mesh. I am not certain...

Hi, Consider the conservation laws for an isothermal linear incompressible flow governed by the mass and momentum equation. The kinetic energy equation is then solved to see if energy conserved. Can anyone tell me if once it is shown energy is conserved, it implies that convergence is obtained...

Angular momentum is conserved in a closed system. Is thermal isolation required too? An example special case in mind is a closed cavity high speed rotation. It contains high pressure gas and the thermal flow is driving convection currents creating turbulence and or a heat pumping loop...

Homework Statement I have a part in my ANSYS Mesher that I am attempting to mesh Homework Equations I need to view the interior of my part as seen in the photo. However, each time I try to view my mesh this way, I get the view seen in the second image. I need to fix this issue so that I can...

whats turbulent viscocity?How it different from viscocity?Also i read that viscocity is fluid property.So has flow condition like laminar or turbulent has any effect on viscocity?

I quoted these post from other thread. I don't want to distract discussion in other thread so I'm starting a new one about statements in these posts. Basically the question is if we can violate Bell inequalities by two separated but correlated systems that can be as non-classical as we like (as...

I have a bachelor degree in Mechanical Engineering and I am interested in CFD. I have an admit offer for MS in Nuclear Engineering at UIUC with RA and MS in Mechanical Engineering at Stanford without any assistantship. Which one is a better option to choose considering the fact that I am not a...

Hi everybody, my question is not properly about CFD but mainly about Fluid Dynamics itself. I have performed a RANS simulation of a round jet of methane and air and now I'd like to compare those results to some experiments. Unfortunately there aren't papers about experimental data for...

I am about to graduate with an aerospace engineering degree. I am planning to go into grad school for Applied physics(probably plasma physics), which I find very interesting. But the main reason I joined the aerospace degree was because I was interested in CFD. But since I could't land any...

Hi guys, have a very tricky question on my HW to find compact group of global symmetry to this Lagrangian of 2 complex scalar fields L={\partial_\mu \phi_1^*}{\partial_\mu \phi_1}+{\partial_\mu \phi_2^*}{\partial_\mu \phi_2}-\lambda(\phi_1^* \phi_1 - \phi_2^* \phi_2 - v^2)^2 and I can't figure...

I have an assignment involving a duct vent and turbulent flow. Flow enters a duct vent of a certain cross-section, it then reaches another section with a smaller area, at the beginning of which there is a horizontal plate that is radiating heat. It's a 2D problem. Fluid is Air, inflow T=20C...

Hi all, I have been asked to contribute material for a presentation at my daughters school. The subject is alternative energy via solar methods and several other parents have already selected the obvious platforms (photovoltaics, CSP, etc.) and I thought solar updraft towers would be kind of...

Apologies for the quick and dirty question, but I was wondering if a computational fluid dynamics analysis of the flow inside a rocket's combustion chamber and nozzle area would be regarded as an analysis of the chamber's/nozzle's internal ballistics. Looking up internal ballistics on wiki, it...

Cfd -- familiar with ANSYS Fluent or CFX? Is anyone here familiar with ANSYS Fluent or CFX? I have some questions about creating a simulation of subsonic flow over an airfoil. I have done the Cornell University tutorial. I then moved on to try simulating different arifoils, in particular S809...

Hi, I am just about to go into my 3rd year of my Mechanical Engineering Degree and have decided to do a project with the following description: "Laser Doppler Anemometry (LDA) is a non-intrusive technique used to measure flow velocities and turbulence quantities in a fluid flow. The...

I want to learn some basics of Computational Fluid Dynamics.But most of the books that I found dealt mostly with the theory of it with very less examples or problems to be solved numerically. I know Matlab and am pretty good at coding too.So, I am searching for a book from which I can learn CFD...

Homework Statement Hi guys, we are supposed to program the velocity and temperature fields for the 2-dim Navier-Stokes, using the pressure correction method and Boussinesq. approx for the temperature field. The relevant set of equations and B.C. is displayed below: Homework Equations...

Hi, for my third year project i have got to design a nozzle to fit a fire extinguisher. However firstly i must analyse fluid flow within said nozzle, but i have no idea how to use GAMBIT/FLUENT and finding it difficult to find relevant user guides on the internet. Anyone care to offer some...

Hi guys I was wondering if anyone on here could help me out. Essentially I am trying to build a higher order cfd code and struggling to work out where to start, I’m trying to build it using polynomial fitting so here’s my problem. Taking my domain as...

Hey everyone, I've got a question that been in the back of my mind for a few months now. Hopefully someone on this forum can provide me with some guidance. I just finished my undergraduate career in aeronautical engineering; I'll be starting graduate school this coming August. On a gut feeling...

I am using Solidworks to model the pressure distribution of air around a large fan. The fan is 10' in diameter and moves 94,000 CFM. I need to know the effect adding a large duct around the inlet of the fan would have on the pressure. If the duct causes a huge pressure drop then we can't use it...

Back in 1988 when I graduated, I can't even remember there being a course in computational fluid dynamics (CFD) let alone taking one. If you're in college/university today or graduated recently, did you take a CFD course? I'm wondering how common it is now. Also, if you took a course in CFD...

I am using VOF model for simulating..but within 1 or 2 time step courant number reach its limit and iteration stops..i reduced the time step size from 1 to 0.05 but there is no result of it..and i have to simulate it for around 1hour.. how can it be possible to increase courant number..or what...

Hey All! Happy Monday (No one likes hearing that) I've been recently looking into the different CFD programs available, and have become somewhat overwhelmed. My purpose today is to get some opinions, reviews, or experienced guidance on which programs would be useful to look into further...

Hello all! :smile: After graduating with my BS and MS in mechanical engineering, I have come to the conclusion that I want to start a career in CFD. I used CFD on a co-op that I worked for a while and have always been drawn to and excelled in fluid dynamics related courses. I am currently on...

Is it possible to do a failure investigation as well as cfd analysis in a catalytic Converter to determine nature, cause of failure, and how it affects flow.I want to do this a part of my project.

Hi all, I have just completed my undergraduate studies in Mathematics from a UK university (specialising the Mathematical Physics and Fluid Dynamics) and will be continuing on a Masters programme in Applied Mathematics come fall. For my Masters, I would like to do something on CFD but the...

I need some help in understanding some of the governing equations of computational fluid dynamics. I already have some books to read, others are on their way, yet I still find it difficult because I learn much better on examples rather than pure theory. I was hoping someone could 'read out' for...

I've been intrigued lately by pulse jet engines and their simplicity. Unfortunately, they are notoriously loud and inefficient. I've come up with a design that I think may improve both of those, but before trying to actually build it, I thought it would be a good idea to try to model it first...

Hi guys this is my first post. I hope it's in the right place. I am trying to model heat flow over a plate positioned very close to exhaust from a jet engine. Can anyone recommend software that can do this? I'd like to be able to visualize the airflow itself, its temperature and the...

Hey guys, I've got a CFD question about the image linked below. Basically, I've got the thing designed and I ran a simple flow simulation on it, but I'm curious about the information it's telling me. I can see that the flows are definitely going down the rifling, but I'm not sure what the...

Hi all, I am working on a project in where I have to find drag and lift forces on a 3D rendering of a starfish. See below for a picture of the organism in question. http://www.piscoweb.org/files/image/research/Ecosystem-Monitoring/Rocky-Shore-Monitoring/pisaster.jpg This particular...

can u guys tell me what exactly is CFD and hit me with some usual stuff like links and videos so that i can get good at it.. thanks in advance

i have got a project about dimpled airfoils and i need a good computer simulation and my professor told me that cfd is very more complicated than i can handle so i can't do anything but i need to do something and i am ready to learn cfd(i'm a great c,c++ programmer) what do you think i should do...

Hi I want to model a race track in CFD. This is so I can figure out the best racing line. Is it as simple as finding where the fluid flows fastest, and thus showing the best racing line? I know its a little over the top, but its for a go cart track I race on, and I want to know how to...

Hello, Though I am a CFD Engineer, I am interested in knowing about "MIND". The question might seem silly to some of you, But, I feel it is philosophical question. Can mind exist without physical brain?. That is when some one is dead / Suffering from brain dead?

Dear all, Anyone can tell me about the algorithm to write a simple CFD code to solve a flow problem.starting from grid gen, solver,post results. pls refer some site providing sample codes.

Hi, I like to start writing 2d CFD code for laminar flow using SIMPLER algorithm using c. help me from where i get information abt grid generation methods and GUI. If anyone had written such codes can guide me.

I just recently graduated with my BS degrees in physics and applied math but am interested in switching my career path towards mechanical engineering. I honestly don't know much about CFD at all, so I was wondering how much of the fluid mechanics you learn in the ME classes is actually used in...

How can we predict the actual test performance of pump from CFD. I need some formulation/calculation method to predict closure.

Hello everyone, I am an looking for a senior project for aerospace engineering. In my Applied Computational Fluid Dynamics (CFD) course it came up that one of the many applications of CFD is astrophysics and the modeling of planet/star formation. Our professor suggested it to me as a...

In my effort of approximating drag constants for bullets, I have come across the McDrag program, by Robert L. McCoy. The disadvantage is that it approximates drag constants based on a few predefined shapes and a drag model (e.g. G1, G7), limiting it to only the simplest of bullets. Fully...

Hello all, OPEN FOAM is an open source program for performing CFD (Computational Fluid Dynamics) simulations. Here is the hompage for it. http://www.opencfd.co.uk/openfoam/ It requires a good deal of source code interaction in order to run. (So I have been told.) That is why I...