Flow Visualization Lab

Improved Essays
Lab 1: Flow Visualization
Jintark Kim
Purdue University
ME309 lab Section 009 Abstract The purpose of this experiment is to visualize and analyze the flow patterns formed by objects in different conditions: cylinders in different diameter at different flow rate, and airfoils with different angle of attack at a constant flow rate. Properties of water at measured temperature and flow conditions for each trial were used to compute the Reynolds number. Red-dye ejector was used to traces the flow field around experiment objects. The cylinders with 2 different diameters (6.35mm and 25.4mm) at different water channel speed (1.25 in/sec and 3.00 in/sec) were used to observe flow patterns in 4 different Reynolds numbers. In addition, an
…show more content…
The Von Karman vortex street becomes more turbulent with increasing Reynolds number. In the airfoil experiment, the airfoil with 0° angle of attack shows the laminar and smooth flow pattern while the airfoil with 20° shows the turbulent flow pattern. The result of this experiment strongly supports the validity of using Reynolds number to predict the flow pattern. Predicting rough conjecture of flow pattern without experiments can reduce the time consumption for design projects related to flow. Accordingly, the flow pattern analysis from this experiment contributes to engineering development. Introduction Flow visualization is a classic technique that visualizes flow patterns by using colored dye, or other tracking material. The visualized flow pattern is recorded by camera subsequently. Flow visualization is needed when designing and testing any components related to fluid flow such as car body, jet engine, aircraft, etc. Many fields of industry are related to analyze how an object is affected by surrounding flow field. The Reynolds number is used to predict the flow patterns. Reynolds number is given in Equation 1 (Fox, Pritchard, & McDonald, 2009). Re=ρ VL/μ (Eq.1) …show more content…
Airfoil is placed approximately 1 inch away from the tip of the nozzle. The height of the nozzle is then adjusted so that dye is injected on the middle of the front of airfoil. After 30 seconds, red dye is released and the pattern is recorded by cell phone camera (School of Mechanical Engineering, 2016).

Results The measured temperature and kinematic viscosity of the water are listed in Table 1. Temperature of the water tunnel is measured by thermocouple at the beginning of the experiment. The kinematic viscosity of the water is retrieved from the table of properties of water in Appendix A. Interpolation was used to approximate the most accurate value of the viscosity. Calculation of interpolation is shown in Appendix A.

Water Temperature (°C) 16.6 ±0.1
Kinematic Viscosity (m2/sec) 1.10×〖10〗^(-6)

Reynolds number for each test case shown in Table 2 is calculated using interpolated kinematic viscosity value, diameter of the cylinders, and water flow rate. Detailed calculation is shown in Appendix

Related Documents

  • Decent Essays

    Nt1310 Unit 1 Lab Report

    • 157 Words
    • 1 Pages

    Three test tubes where number 1-3, the first and second test tubes (#1,#2) where mark at 1cm and 5cm from the bottom of the test tube while test tube #3 was mark at 3cm and 7cm. Test tube #1 was filled up to the 1cm mark with distilled water and to 5cm with Hydrogen peroxide. The substance was swirl for 30 seconds and the height of the bubbles column where recorded. Test tube #2 was fill up to the 1cm mark with catalase and to the 5cm mark with hydrogen peroxide. The substance was swirl for 30 second and the height of the bubbles column where recorded.…

    • 157 Words
    • 1 Pages
    Decent Essays
  • Improved Essays

    Zach Verlander Experiment

    • 589 Words
    • 3 Pages

    Zach Verlander was the recorder for this lab. Greg and Kyle tag teamed to calibrate the flow rate of the water using a graduated cylinder to measure the volume and a stopwatch for the time. Zach was in charge of controlling the computer system and recording the data it displayed. After calibrating the flow rate, Kyle was in charge of one pressure sensor, while I moved the other pressure sensor from spot to spot. Having two people manage the pressure sensor decreased the chance of mixing up the two sensors.…

    • 589 Words
    • 3 Pages
    Improved Essays
  • Great Essays

    Geography Quiz Answers

    • 1270 Words
    • 6 Pages

    Chapter 14 - questions* 1-20 on pages 442-443 1. Streams collect water from runoff and discharged groundwater, and they conduct it from elevated regions of the continent down to the sea. 2. Dendritic drainage develops a dendritic network which looks like the pattern of branches connecting to the trunk of a deciduous tree. Radial drainage form on a cone shaped mountain flow outward from the mountain peak.…

    • 1270 Words
    • 6 Pages
    Great Essays
  • Improved Essays

    Beaker Experiment

    • 991 Words
    • 4 Pages

    Fill the flat beaker with water. 6. Place a plastic bag over the top of the cylinder and place it, upside down, in the flat beaker. Make sure the bottom of the beaker is always underwater. 7.…

    • 991 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Potato Enzyme Lab

    • 997 Words
    • 4 Pages

    The effect of various temperatures on Enzyme activity Introduction: The basic properties of life revolve around chemical reactions. Without the presence of enzymes some of life's processes would not happen easily. An enzyme is a macromolecule serving as a catalyst, they are generally a protein based molecule, as it is in the lab, Enzymes are organic catalysts that control the rate of chemical reactions in cells while not being permanently changed or without being consumed, which makes enzymes different from other proteins. In general, enzymes speed up the rate of reactions by lowering the activation energy required to start reactions. Furthermore, Enzymes are extremely well organized.…

    • 997 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Tepid Water Recipe

    • 362 Words
    • 2 Pages

    1. Fill a mason jar half-full with tepid water. Put it on the hotplate and raise the temperature to 98 degrees. Make sure you can keep it at this temperature for several hours. 2.…

    • 362 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    How and where you kick the ball is the most paramount angle inside the sport of soccer. Lets say you kick the ball flawlessly providing for it no pivot (or twist), this implies that you have given the ball a speed (v) and a starting precise rate of zero. At the point when the ball comes into contact with the ground it will start to turn in light of the fact that the ground is not frictionless. The soccer ball will in the long run start to move without slipping, which is the point at which the balls focus of mass is equivalent to its precise rate. Presently accept that you need to strike the ball so it instantly starts to move without slipping.…

    • 1162 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    Enzyme Lab Report

    • 537 Words
    • 3 Pages

    After waiting two minutes, I made note of the volume of the fluid in the graduated cylinder 7. I subtracted the initial volume from the final volume in order to determine the change in…

    • 537 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    Density Lab

    • 722 Words
    • 3 Pages

    Objective- Our goal for this lab was to calculate the Density of a substance. We needed to make sure we had the materials to find mass and volume and then use a formula to calculate density. Introduction- The main principle of this experiment was to figure out the Density of certain objectives given to us in the lab.…

    • 722 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    Calorimetry Volume Lab

    • 1166 Words
    • 5 Pages

    In the volume lab, we found that the large graduated cylinder was the most accurate because it had less percent error when measuring the density of water over all of the other measuring tools. In this lab, we measured water from pipettes including volumetric and graduated pipettes, graduated cylinders, erlenmeyer flasks, and beakers to figure out the mass and density. These measurements were then used to calculate the percent error. We completed these measurements by measuring the volume of the pipettes in milliliters, the initial mass of the beaker without water in grams, and the final mass of the beaker with water in grams. We did this procedure again, and also tested the temperature of the water with the graduated cylinders, erlenmeyer flasks, and the beakers of the second trial.…

    • 1166 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    7. Get your stopwatch ready and start the timer when you remove your hand. 8. Record the time it took for all the material to leave the funnel. Calculate mass flow rate.…

    • 645 Words
    • 3 Pages
    Improved Essays
  • Superior Essays

    The flask opening was sealed off using the stopper attached to the opposite end of the rubber tube. The concentration in the flask was swirled until 10 ml of oxygen was collected in the test tube. The amount of time taken by the oxygen gas to fill the test tube replacing the water was recorded. After the initial experiment both the graduated cylinder and Erlenmeyer flask were thoroughly cleaned and the graduated cylinder was refilled with water. the graduated cylinder was placed back into the beaker of water and the glass tube was reinserted in the end.…

    • 1206 Words
    • 5 Pages
    Superior Essays
  • Decent Essays

    Underwater Fountain Lab

    • 146 Words
    • 1 Pages

    TITLE: An Underwater Fountain Purpose: The purpose of this experiment is to find out the density of hot water and cold water Hypothesis: My hypothesis is I think that hot water will rise and float Procedure: 1. Tie the string around the neck of the small bottle. 2. Fill the bottle with hot water and add three drops of food coloring 3. Put cold water on the jar 4.…

    • 146 Words
    • 1 Pages
    Decent Essays
  • Superior Essays

    Scientific Method Essay

    • 1240 Words
    • 5 Pages

    It is an experiment that tests density and gravity. The gravity is attempting to pull the tin foil and pennies downward, while the density determines whether if the boat will float or sink. If the object is denser than the water, the foil will descend. However, if the boat is less dense than the liquid, it will increase. As people know, foil is not the strongest material to build a boat out of so this will be a challenge.…

    • 1240 Words
    • 5 Pages
    Superior Essays
  • Improved Essays

    A Helmholtz resonator is a rigid container which has an opening to the air surrounding it. A common example of a Helmholtz resonator is a bottle because it has a set volume as well as having an opening which is open to the surrounding air. By considering the Helmholtz resonator as having a neck, such as the neck of a wine bottle, the dynamics of the system may be described. When energy is introduced near the opening of the bottle, for example blowing across it, some of the energy will vibrate the cylindrical plug of air inside the neck of the bottle. This plug of air is assumed to move as a unit.…

    • 1380 Words
    • 6 Pages
    Improved Essays