 13 Apr, 2019 7 commits


Olivier authored

Olivier authored

Olivier authored
Two important errors in the problem questions are fixed, with my sincere apologies: * Question 2.3.2 could not be answered. The velocity is now given in the problem description and is not an unknown * For questions 2.5.9+, the temperature at outlet must be taken as 165°C not 65°C.

Olivier authored

Olivier authored
(with thanks to the student who reported the error)

Olivier authored

Olivier authored
With thanks to students who reported the issues

 12 Apr, 2019 1 commit


Olivier authored

 11 Apr, 2019 3 commits
 10 Apr, 2019 2 commits
 05 Apr, 2019 1 commit


Olivier authored

 03 Apr, 2019 7 commits
 02 Apr, 2019 9 commits


Olivier authored
The problem remains nonexaminable this year, but should be interesting enough to be part of the main problem sheet now

Olivier authored

Olivier authored

Olivier authored
Also, the boundary layer momentum thickness is now written as delta** instead of theta.

Olivier authored

Olivier authored

Olivier authored
* Flow parameters (Re, Ma etc) come first, then force coefficients * New brief section on building models * Moved flowparametersasforceratios section to appendix * Overall rewrite & strenthening

Olivier authored
* New exercise exploring practical implications of having laminar flow in pipes * Expanded/strengthened oil pipeline problem * Kugel fountain exercise delisted, moved to back (fun not really critical) * One unconvincing theory exercise moved to archive * Wind tunnel design problem also moved to archive (not so well suited to individual coursework)

Olivier authored
The chapter is still unsatisfying in my eyes. I would like to see a more systematic method for quantifying pressure difference in pipes (mixing height, expansion/contraction, local losses, and wall friction losses). I would also like to see a good systematic (even if approximate) exploration of the dependency between the main parameters at hand. * Delta p_friction is now uniformly refered to as Delta p_loss * Ditched entrance effects, focus in on fullydeveloped flow and on methodology * Summary added at end to better picture relevance of chapter in view of the entire course

 31 Mar, 2019 5 commits


Olivier authored

Olivier authored
Basically rewrote the chapter, even if core content remains same. * Change in structure: first, general equations, then, incompressible equations * (even) more realistic commentary about usefulness + suitability of the equations. Text now explains (but does not show…) that other terms and equations can be used in practice, according to needs * Derivation of Bernoulli from NavierStokes moved to appendix.

Olivier authored

Olivier authored

Olivier authored
* Calculation of forces come first. Moments are ditched * Fixed notation of velocity components: either V_x or u, but not u_x * Velocityfield guesses, which are the core method for the problem sheet, are now presented as a special case (just like fluid statics for pressure force calculations). * Brief example added: Couette flow

 30 Mar, 2019 4 commits


Olivier authored
* Calculation of forces on wall come first. They are actually the most useful equations in the chapter * The derivation of the "grad p = rho g" equation is now done in 3D, in line with the other chapters. I never completely understood the method I used to use (taken from classic textbooks) and suspect it just is worth nothing Part of the new derivation is taken back from chapter 6. * Static fluids are now clearly presented as a special case. This is now also reflected in the problem sheet.

Olivier authored
* Major cleanup. The problems that are not clearly about calculating a pressure force on a wall are gone. * Added one problem with nonstatic pressure distribution and nonflat surface (taken down from problem sheet 11)

Olivier authored
* refreshed formula sheet * labeled nonexaminable exercises * fixed page layout somewhat

Olivier authored

 29 Mar, 2019 1 commit


Olivier authored
* Reworked & clarified notation of velocity vector/components/norms * Clarified perfect gas model notation * Clarified poweraswork definition
