1. Poster Print Size: This poster template is 36” high by 48” wide. It can be used to print any poster with a 3:4 aspect ratio. Placeholders: The various elements included in this poster are ones we often see in medical, research, and scientific posters. Feel free to edit, move, add, and delete items, or change the layout to suit your needs. Always check with your conference organizer for specific requirements. Image Quality: You can place digital photos or logo art in your poster file by selecting the Insert, Picture command, or by using standard copy & paste. For best results, all graphic elements should be at least 150-200 pixels per inch in their final printed size. For instance, a 1600 x 1200 pixel photo will usually look fine up to 8“- 10” wide on your printed poster. To preview the print quality of images, select a magnification of 100% when previewing your poster. This will give you a good idea of what it will look like in print. If you are laying out a large poster and using half-scale dimensions, be sure to preview your graphics at 200% to see them at their final printed size. Please note that graphics from websites (such as the logo on your hospital's or university's home page) will only be 72dpi and not suitable for printing. [This sidebar area does not print.] Change Color Theme: This template is designed to use the built-in color themes in the newer versions of PowerPoint. To change the color theme, select the Design tab, then select the Colors drop-down list. The default color theme for this template is “Office”, so you can always return to that after trying some of the alternatives. Printing Your Poster: Once your poster file is ready, visit www.genigraphics.com to order a high-quality, affordable poster print. Every order receives a free design review and we can delivery as fast as next business day within the US and Canada. Genigraphics® has been producing output from PowerPoint® longer than anyone in the industry; dating back to when we helped Microsoft® design the PowerPoint® software. US and Canada: 1-800-790-4001 Email: info@genigraphics.com [This sidebar area does not print.] Asbestos toxicity has been shown to vary with fiber length. To conduct larger scale studies on this effect, a fiber separator capable of filtering large batches of fibers based on length is needed. Fibers align with local shear stress vectors, therefore fibers will be filtered when the shear stress is parallel to the wire-mesh. This study evaluates the effectiveness of the Bauer McNett Classifier (BMC) as a fiber separator. Simulation of Fluid Flow in the Deep Open Channel of the BMC Apparatus Lana Sneath and Sandra Hernandez Biomedical Engineering Class of 2015, University of Cincinnati Faculty Mentor: Dr. Urmila Ghia, Mechanical Engineering 1.Jana, C. (2011), “Numerical Study of Three-Dimensional Flow Through a Deep Open Channel- Including a Wire-Mesh Segment on One Side Wall.” M.S. Mechanical Engineering Thesis, University of Cincinnati. 2. White, F. M. (2003) “ Fluid Mechanics”, McGraw-Hill, 5 th Edition. 3. Fluent 6.3 User’s Guide. 4. Gambit 2.4 User’s Guide. 5.Tamayol, A., Wong, K. W., Bahrami, M. (2012) “Effects of microstructure on flow properties of fibrous porous media at moderate Reynolds number”, American Physical Society, Physical Review E 85. References Boundary Conditions: Calculating K and C2 Methods and Materials Results: Solid Side Walls Model These findings indicate that the total shear stress value is greatest at the inlet, and quickly drops down as the x-position increases. In the solid-wall model, the highest out-plane angle where the screen lies in the actual BMC channel is 8 degrees, which is primarily tangential to the wall. The shear stress magnitude in the porous boundary model is expected to be slightly greater. The difference is expected to be determined in future work. Flow through the screen is expected to be small, hence the contribution of the porous boundary to the off plane shear stress angle is expected to be small Future work of this study: Analyze the shear stress distribution of the porous boundary model Understand the behavior of fluid flow in the porous boundary model Discussion Goal: Numerically study the fluid flow in a deep open channel Objectives: a) Learn the fundamentals of fluid dynamics. b) Learn the fundamentals of solving fluid dynamic problems numerically. c) Simulate and study the flow in the open channel of the BMC apparatus, modeling the screen as a solid wall boundary (i) d) Model the screen as a porous boundary (ii) e) Determine the orientation of shear stress vector on screen boundary for both (i) and (ii) Materials: Computational Fluid Dynamic (CFD) tools FLUENT and Gambit Steps in Methodology: a)Define channel geometry b)Set up channel geometry in Gambit and generate a computational grid c)Enter boundary conditions and obtain flow solutions i.Solid Wall Model ii.Porous Boundary Model d) Compute shear stress on flow solutions Results: Porous Boundary Model Figure 3. Channel Geometry in Gambit Figure 4. Boundary Conditions Free-Slip Wall, v=0, du/dy=0, dw/dy=0 No-Slip Wall, u = v = w = 0 Inlet, u = u(y,z), v = w =0 Outlet, p stat = 0 Total Points XYZ∆Y min ∆Z min 40500050180450.000050.0007 Figure 7: Total Shear Stress Magnitude (primary y-axis) and off plane angle (secondary y-axis) along the Z-Wall; line at y= 0.1 m (mid-plane), z= 0.02 m = Deep Open Channel Figure 5: X-velocity contours in top half of channel; plane at x= 0.2 m Velocity contours bulge towards corners Symmetric across the center of the channel Highest velocity is in the center of the channel Figure 6: X-vorticity contours in top half of; plane at x= 0.2m Top corners are non- symmetrical about the angle bisector High vorticity at the free surface High vorticity is attributed to the free surface being modeled as a free-slip wall Figure 8: X-velocity contours in top half of channel; plane at x= 0.2 m Velocity contours bulge towards corners Not-symmetric across the center of the channel Highest velocity is in the center of the channel Figure 9: X-vorticity contours in top half of channel; plane at x= 0.2 m High vorticity at the free surface and near porous boundary As previous case, vorticity is low at right side wall Top corners are much more non-symmetrical about the angle bisector Solid Wall ModelPorous Boundary Model Porous-Jump, K = 9.6e-10, C2=7610.7 1/m, screen thickness = 9e-4 m; Values correspond to 16 a mesh [5] Figure 1. Side view of BMC apparatusFigure 2. Top view of elliptical tank in the BMC Table 1. Distribution of grid points and smallest spacing near boundaries Solid wallPorous wall Solid wall We would like to thank Dr. Ghia for being an excellent faculty mentor and taking the time to make sure we fully understood the concepts behind our research. We would also like to thanks our sponsor, the National Science Foundation, Grant ID No.: DUE- 0756921 Acknowledgements Introduction