Physics 34 Fluid Dynamics (19 of 24) The Drag Coefficient

In this video I will explain how different shaped objects have different drag coefficients.

Next video in this series can be seen at:

[noidontwantthat]

Force of gravity: dont worry we will go through the fluid just fine nothing can stop me

Buoyant force, viscosity and drag force: *PILLARMEN THEME*

[kindjupiter]

Gute besserung Herr van Biezen. Thanks for nice teaching

[familyzcooking]

thank you so much!! it's really useful.

[timetraveller]

i am confused why is there different formulas about the force of drag one is the stokes law and this why two different ons i am confused please

[TheCobyRandal]

"Streamlined Body" also looks a lot like the body of a fish! Nice video. Thanks for sharing.

[huanqinghuang]

I have a question regarding the formula used to calculate the drag force in this video. From a previous video about the Stoke's law, the equation used to calculate drag force of a sphere is FD=6πμRv, whereas is shown as a different equation in this one. Why are there different exponents of v in the two equations? Are they referring to the same concept? Thanks.

[bsm]

does hydrodynamic drag coefficient is different from aerodynamic drag coefficient for same object. just say I took a hemisphere in air and underwater does Cd value change or any other considerations i have to take to find out the same

[handychandra]

Open my understanding after 27 years read fluid mechanics book by Franzini

[walkreadsleep]

Excellent and thought provoking! Thanks.

[hazimalkurishy]

Hi DOCTOR
Could you please tell me what is the project area for cylinder, sphere and each single ship i will really thankful?

[yeohguanlaiandy]

I am having trouble to determine drag force with my question regarding raising ball is happened now if i change the movement of ball which i pull it out from the liquid (the movement of ball in the fluid will become upward), does drag force still exist here on the ball and where is the direction of it?

[derrickbecker]

How come drag force is half of jet force rho A v^2?

[beargillium]

Doesn't the coefficient depend on the orientation of the object? It's not clear in which direction the drawn shapes are moving... Is it downward of left to right or right to left? Won't objects like the half sphere or the cone or any object automatically take on the lowest coefficient? Sorry I started writing this before the end of the video; hopefully it's all explained later!

[MustafaKhan-pvqs]

Wow thanks you are awesome! Can you also teach me how to find the coefficients of lift?😄

[upanddown]

thank you Sir，I have a few questions:
is the fluid still or kinetic, If the fluid is kinetic what should we do？the case will be more complicated I think，the fluid is moving, there are three conditions for sphere, 1.floating on the surface of the fluid, 2.Submerged in the fluid but not at the bottom，3. on the bottom, so for these three cases, how to proceed to motion and force analysis?

[MustafaKhan-pvqs]

And Cd depends on Reynolds numbers right?

[jpdemont]

Wonderful lecture.  Thank you very much for making and contributing these.

[philwesom]

what exactly is the border line between long cylinder and short cylinder....?

[aymanboudaya]

Hey could you help me please I want to calculate Cx and Cz (drag and lift coefficient) of a 46m/s wind speed at an inclined panel with 30° incidence angle the force should be daN/m² or we could calculate the Drag and lift force on a panel of a 1.7x1 = 1.7m² area. SEARCHING SINCE A WEEK BUT NOTHING FOUND ON INTERNET. MECAFLUX software GIVES An automatic RESULT BUT I couldn't calculate manually.

[bengrindell]

'Very' well explained!!! Thankyou!! : )