Hi there,
I am working an a stationary, laminar flow model and would like to calculate the drag of that model.
Now the Comsol forum guys suggest to use the operator reacf(u). It is also used in the "Flow over a circular cylinder" tutorial. Does anyone know where to get it from or how to use...
1)Can two streamlines(line of flow) converge to a single one ?
2) When water flows from the tap, as it flows down the horizontal area of cross-section decreases...An argument using the Equation of Continuity is given...but I have two doubts regarding those
i) Is water in freefall Laminar...
Homework Statement
How do you I calculate the Laminar Boundary Layer Y in meters with Blasius Equation?
I have an expression for U (m/s) and u/U and u(m/s) and also eta=0.1, 0.2...5.2. I am wondering how one could calculate the y laminar boundary layer (m), the y buffer boundary layer (m)...
Hi
I’m student at a french university, I have to present a project about swimsuit and I must carry out experiments. I’ve decided to work on the buoyancy of swimsuits, the flow around it and drag. To measure drag, I think I’ll drop a heavy ball wrapped in swimsuit material in the water and...
Hi, guys, i tried to read the definitions of laminar and turbulent flowon some of the website, but had difficult time understanding them. I am wondering if you guys can explain the above terms in more plain words?
Hi guys, first post and I hope I got the right forum.
I have been doing some reading on fluid dynamics and there are a couple things I can't figure out.
1) When you light a candle or something and the smoke rises. It starts of nice and smooth, but then turns all turbulent after a little bit...
Hey guys, I am kind of confused here but can you guys define for me inviscid flow and laminar flow?
In my understanding, inviscid flow is when viscous effect is very weak and laminar flow is when reynolds number is in general, less than 2300. In that effect, does that mean that viscosity for...
Hi
What is the fundamental reason why a fluid with laminar flow going through a constriction in a pipe has lower pressure?
Pressure is defined as force per unit area so the fluid particles must be hitting the pipe wall in the constriction with less force.
Beetroot
Hi
I am working in an application where we pump a fluid in a water -filled tube, where the second fluid has a viscosity of 3-4 times the viscosity of water. We have laminar flow (Re around 20).
If the fluids were 100% compatible (e.g. colored water vs clear water) I have determined that...
Hi,
I'm trying to find some data on the entrance region of a curved duct with a rectangular cross section. Its a heat transfer problem where the fluid flows through a rotated duct. The distance of the duct is smaller than the entrance region for a straight rectangular duct of same...
I understand that there can be turbulent flow and laminar flow. However, there is a term 'eddies/eddy' related to this which is not explained in my textbooks. What is an 'eddies/eddy'? :confused:
Thanks in advance.
Homework Statement
What are the equations that govern the steady laminar flow of blood, modeled as an isothermal,
incompressible, Newtonian fluid, through an aneurysm in the aorta, which is idealized as a “spherical
bulge” located in a straight tube?
Homework Equations ??
Assumptions...
I'm currently a freshman chemical engineer at Penn State and I've gotten so frustrated at fluid transport that I have resorted to online forums for one last desperate attempt to try and figure out what exactly is going on. This question is part of a long agonizing 2 week homework assignment and...
Problem:
Two horses pull a barge from rest in a canal filled with a viscous fluid that provides laminar resistance (FR = –kv). The two horses walk on each side of the canal so that their net force is applied exactly forward. The barge has a mass of 3000 kg and the donkeys pull forward with a...
Problem:
Two horses pull a barge from rest in a canal filled with a viscous fluid that provides laminar resistance (FR = –kv). The two horses walk on each side of the canal so that their net force is applied exactly forward. The barge has a mass of 3000 kg and the donkeys pull forward with a...
Homework Statement
Oil of Density 888kg/m^3 and viscosity 0.8Pa*s is flowing in a horizontal pipe of diameter 0.15m. The local flow velocity at the centerline is 10m/s. find the shear stress exerted by the oil on the wall of the pipe.
Homework Equations
tau = -eta*(dv/dy)
The...
RE: non-compressible, laminar flow, Newtonain fluid.
Viscosity is often defined by looking at a fluid between two plates with the upper plate moving at a small velocity relative to the lower plate. The plate moves in the x direction and a velocity gradiant is created. Viscosity is then...