Reynolds Number and Flow

What two parameters are responsible for creating the movement (filtration and reabsorption) of fluid across the capillary wall?

1. What two parameters are responsible for creating the movement (filtration and reabsorption) of fluid across the capillary wall?

The higher the water potential in one location compared to another location, will cause the water and molecules to move from the high potential to the low water potential.

Turbulent flow is the flow of fluids in a chaotic way due to property changes. The Reynolds number is higher than that of laminar flow making it able to freely move. They create a rotational high energy movement. Eddies are a good example of turbulent flow off of jet streams. They create that vortex circular motion and are high energy to start and will

What two parameters are responsible for creating the movement (filtration and reabsorption) of fluid across the capillary wall?

The objective of this exercise is to measure the pressure distribution across the surface on an aerofoil in a wind tunnel. The aerofoil is tested under several different Mach numbers from subsonic to supercritical. The purpose of measuring the pressure distributions is to assess the validity of the Prandtl-Glauert law and to discuss the changing chracteristics of the flow as the Mach number increases from subsonic to transonic.

blows across the surface of a body of water, the water begins to move from small

A Newtonian fluid is a fluid that exhibits constant viscosity regardless of any external stress applied to it, like mixing or a sudden application of force. Like water; this flows in the same direction regardless of whether it’s left alone or agitated. A Newtonian fluid, by definition, can only be affected by pressure and temperature together, or temperature, but not pressure on its own.

Once water falls back to Earth as precipitation, it moves all around Earth’s surface. Because of the downward pull of gravity, water always flows downhill. And because Earth’s surface is uneven, water is always moving around. There are four main ways that water moves around Earth.Surface water, and runoff is moving water that flows around Earth’s surface is called runoff. Streams and rivers are examples of runoff. Runoff will always flow downhill pulled by gravity, until it eventually reaches an ocean, lake, or other large body of water. Runoff is the reason that oceans don’t run out of water. Any water that is found on Earth’s surface is called surface water.

In this experiment, the velocity profile for a flat plate at zero pressure gradient of a boundary layer at two different stream wise points were acquired. The investigation was also based on and how changes in Reynolds number affect the velocity distribution within boundary layers. Parameters such as the Momentum Thickness, Displacement Thickness, Shape Factor, shear stress and coefficient of friction was also calculated to gain a better understand of boundary layers. The experimental values calculated were compared to the theoretical Blasius for laminar flow and Power Law Solutions for turbulent flow to see how they varied. It was found out the higher the Reynolds number the greater the boundary layer thickness. As the

Every cell membrane incorporates a fluid mosaic model. The “mosaic” of protein molecules embedded in a lipid bilayer. It’s fluid as most proteins and lipid molecules drift through it. The membrane consists of a phospholipid bilayer embedded with various proteins. The proteins help to get polar/hydrophilic molecules through the plasma membrane. Polar molecules have difficulty passing thru the hydrophilic membrane. Nonpolar molecules however, easily pass thru. The proteins can be integral proteins, meaning they go all the way through the lipid bilayer or peripheral proteins that sit on the hydrophilic outer layer and wait for something to happen. The layers are somewhat fluid, allowing the proteins to move across them. See diagram below.

Throughout this lab, three traps were utilized to obtain the most soil arthropods. They are as followed: berlese funnel trap, pitfall trap, and sifting through soil. The materials needed to set up a berlese funnel are a ten liter soda plastic bottle, (metal holes circular), and lastly soil. The ten liter plastic soda bottle needs to be cut across the top and bottom, making the shape of a cylinder. After putting the soil in the berlese funnel trap, by using a shovel, a heating light is required. To set up the pitiful trap a plastic small cup is required. Then a funnel is placed inside the cup so it is level with the plastic cup. Lastly, rubbing alcohol is required at the bottom of the pitiful fall trap which is necessary for the arthropods found to die. The last method used to discover soil arthropods required a metal bin, shovel, and soil.

Alternatively, it can also be explained by referring to the equation , where the k value is constant while the hydraulic gradient i defined by i = ΔH/L increases because the head difference ΔH is constant while the flow length L becomes shorter when it gets closer to the barrier wall.

-The Reynolds number of this experiment was then calculated using equation (4) where c is the length of the aerofoil chord and is the dynamic viscosity of air.

the condition z1≠z2 is true if the two pressure taps are not horizontal (at different height).