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Apologies for the silence. I completely agree that one must work towards being recognised and provide useful contributions before retrieving the prize of doing more exotic work (not necessarily basic research, just more fundamental applied research as was said). The intent of this post is to...

Hi, currently my job doesn't satisfy my interests as it doesn't especially utilise the skills or knowledge obtained from my PhD. Not only that, but I feel my PhD research itself was very systems based and top level (since it was industrially sponsored) and since then I've been hoping to enter a...

I'm not sure if this relates to you career agenda, but I am personally publishing an average amount during my PhD, but saving enough material for at least two publications after the PhD. This is because if I take an industrial job, I can still publish steadily so that when I find an academic job...

Just to add, I am very much appreciative of the research I have been able to do, although I never mentioned that I was being funded. But the key issue is not at present, but if I work for this large company. It's a shame that smaller companies tend not to have sufficient funds for the scientific...

I agree that treating work seriously is an important matter as it is provides our means to living, safety and satisfies our human interests. I personally have dedicated all my efforts to my work, which is why I feel I am able to question this issue in such a way. I also believe it is important...

Google sounds like a very considerate company! The company I work with does allow me some flexibility, although I am more concerned with my life after my Ph.D. when I need to consider working for them. I just value science and engineering far more than business, and I take my work more seriously...

I have spent the past three years conducting doctoral research within a university for a large gas turbine company. I have worked amongst many other Ph.D.'s in the same circumstance and have found the company employees to be, in general, *very* serious. I understand that the nature of the...

I would like to further my understanding in aerospace fluid dynamics as I'm hoping to apply to a fluid dynamics department that sways more towards scientific understanding, at an aero gas turbine company. I have recently read the book entitled Anderson's CFD; Basics with Applications, and I am...

I'm confused as to how this directly relates to my question?!? Maybe I've been hijacked... If anyone has any understanding of energy conservation relating to electric currents and Lorentz forces I would very much appreciate your input. Cheers.

Thanks for the speedy response. How about when the magnetic field strength is increased to a huge amount whilst the current remains low? Power = current * voltage = I V I= Force/(magnetic field * arc length) Warrington's formula for still air: V=28740*arc length/I^0.4 As current...

I understand that for a fixed massflow the minimum amount of power required to generate a thrust is: P = Massflow * ∫v dv = massflow *0.5* [v2^2 - v1^2] However, is it possible to produce the same thrust with less power using the Lorentz force in an electromagnetic accelerator? If so, how can...

I am trying to understand how the Lorentz force affects bulk fluid motion when I have an applied electric field (y-axis), applied magnetic field (x-axis) and bulk fluid velocity (z-axis), all orthogonal to each other. I understand that if the fluid was at rest, an electrostatic force would...

I am trying to understand how the Lorentz force affects bulk fluid motion when I have an applied electric field (y-axis), applied magnetic field (x-axis) and bulk fluid velocity (z-axis), all orthogonal to each other. I understand that if the fluid was at rest, an electrostatic force would...

I am trying to understand how the Lorentz force affects bulk fluid motion when I have an applied electric field (y-axis), applied magnetic field (x-axis) and bulk fluid velocity (z-axis), all orthogonal to each other. I understand that if the fluid was at rest, an electrostatic force would...

Is it usual to customise experiments in fluid dynamics and to what extent? I understand that lasers and imaging tools will be fairly untouchable by a fluid dynamicist, although does an experimental role require any 'tampering/customising of general system equipment i.e. rewiring/handy work...

I believe I am a reductionist by nature and this may be why I find engineering frustrating as rule-of-thumb/well defined methods are regularly used in problems. I believe that fluid dynamics relies heavily on emergentism and particular examples, therefore it's going to take some getting used to...

Sorry Reasonableman, would you mind elaborating on your previous statement? How do they differ in there laws? I haven't studied these subjects, are you studying a physics currently? Cheers

An interesting quote from reading up on Confucius: "To learn and from time to time to apply what one has learned, isn't that a pleasure? ... Learning without thought is labor lost; thought without learning is perilous. (Confucius, Analects)." Maybe I'll get a good book on Physics...

From the below two quotes it seems that fundamental ideas in the current age of physics are based upon processes rather than intrinsic properties and that new found particles are systems of the same substance such as emergence phenomena. Is this the same with other ares of physics? Robert...

Cheers for the replies, very useful. How does one go about choosing an area of fluid dynamics for a career? There seems to be select groups within uni departments that focus on specific areas (although maybe some overlap), presumably due to the time required to understand each area properly, and...

Is anything truly random or is it just effectively random to today's computing power? But yes I understand what your saying about real systems being unique.

I'm mean HUGE bypass ratios that would touch the ground in conventional T&W configs; much larger than the P&W turbofan. Even distributed propulsion has limits due to wing span etc.. Design of bird damage would rise considerably though.

I look forward to the time aircraft eliminate the take-off from ground level and start airborne. Then HUGE bypass ratios could be possible, of course with an FOD trade-off :wink:

If your interested in all electric aircraft propulsion you should search distributed propulsion. Core engines are used to generate power from liquid kerosene and both mechanically transfer power to a bypass fan and also use cryognically cooled wiring/motors to power an array of electrical fans...

But surely this means all solutions that are true for initial condition changes are over simplified and provide an approximate solution in reality? Is it that fluids are so complex that this over-simplification is more pronounced when initial conditions are altered?

Are there any areas in physics that are looking for exact solutions? It seems that for every application there is another fluid theory that applies to it, which intuitively seems like a job for an engineering-physicist rather than a pure physicist. What do you think? I am unaware of the...

Yes to be honest I have to agree, it does all seem great. The technical side complements the theory very nicely from the sound of it. Is it normal to focus on one particular area (application or theoretical issue) for a whole career or is it common to apply knowledge in many areas? It seems that...

By providing such an initial statement (albeit incorrect), a discussion was stimulated that actually uncovered a lot of interesting information. The emergent phenomenon is spot on there, startlingly interesting. The link is below for any curious eyes. Thanks for all your replies and I hope this...

First of all, thanks for the particularly thorough reply. I am in my final year of an AE doctorate and have used some interesting theory over the course, although it is useful for me to know the potential in the theory of fluids as I'm hopefully going to be working in it for more than 3 years...

The thermodynamic relations I currently use within aerospace engineering are dated and based upon particularly well-defined physics. This has made me desire a more undefined science where I can let my imagination play a larger role. By collective behavior, I mean a phenomena rather than...

Yes my wording is poor and I understand a true division between levels of physics doesn't exist. I am trying to understand the difference between collective behaviour and matter/properties ie. The discovery of electrons vs the boundary layer. For me electrons exist under many conditions i.e...

I'm asking due to a potential career move. However, I wanted to know how scientific fluid dynamics is as I'm really not so interested in engineering i.e. parametric design, application based studies and the like. I'm really hoping fluids are as scientific as I'd like! I agree completely that...

Are fundamental discoveries made in fluid dynamics currently, or is it just particular solutions based upon known fundamentals? From reviewing journal literature, it appears that either application based problems have been studied (engineering), or fluids under certain conditions that form a...

Thanks for the MHD links, I'll look into that. Ah yes, I am also considering applying to engineering physics departments; mainly topics such as nanotechnology materials interaction with fluid flow. I understand that, in general, not many analytical fluid dynamics solutions exist. Does this...

I'm currently in my final year of an aircraft propulsion PhD and have become passionate about plasma physics, due to its fluid like similarities. I find engineering too-well-defined for my liking and would like to research in a less well defined field, i.e. physics. I am considering taking a...

Ye thanks I've done that.

Thanks for the speedy reply. I'll explore this direction and hopefully find a neat path. I'm based in the UK and preferably would work here, so my options are a little more limited. However I'm sure this route would be better than taking a 2nd PhD. Cheers

Hi, I'm from the UK and I'm in my final year of an aerospace engineering PhD which focuses on civil aircraft and engine design. For some time I have felt that engineering is too restrictive in terms of the science available to use; due to it's applied nature and safety restrictions within the...

Hi, I'm from the UK and I'm in my final year of an aerospace engineering PhD which focuses on civil aircraft and engine design. For some time I have felt that engineering is too restrictive in terms of the science available to use; due to it's applied nature and safety restrictions within the...

Pkruse, I noticed on another thread that your familiar with the mechnical engineering side of the gas turbine. How varied are the designs that are conceptualised i.e. always a turbine disc roughyl speaking? Do you use kinematics? Do hand calcs and quick designs occur often as a designer or...

AlephZero, What I'm trying to say is ultimately, for say a fan, the blade has been optimised so much that any other novel method of energising a fluid becomes less efficient during its infancy and therefore less attractive to financiers. Changes to fans exist (mainly due to CFD advances) but...

Thanks for the speedy reply. I certainly agree that aerodynamics links much more closely to science than concept design, do you use CFD within this sector mostly or is there much mathematical/analytical modelling (and if so what sort of maths)? Also would an aerodynamicist be interested in the...

Hi, I'm a PhD student working on future airframe and propulsion systems and I'm starting to feel that everything in the aeronautical sector seems to have a pre-planned methodology. An example is to design an aircraft .. you can pick up various books and use very old formulas to design it and...