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CFD Flocculation Tank Simulation goals and meeting minutes.
Research
Fall Fall 2008 Research Paper
CFD Analysis of Flocculation Tank and Design Recommendation
Fall 2008 Research Paper Sub-TopicsTurbulence model validation
Validate which turbulence model to use. K-e realizable or K-w SST
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Examines the back-step example to determine the type of turbulence model to use in FLUENT.Gtheta computationGtheta computationGtheta computation
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Calculate Gθ and compare with the theoretical data
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Determines the Gθ value for various flocculation height (fh) to baffle spacing (bs) ratios using a UDF in FLUENT.Reynolds effects on energy dissipation rateReynolds effects on energy dissipation rate
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Analyze how energy dissipation rate is affected by Reynolds number
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Examines the affect of varying the velocity inlet from .1 m/s which corresponds to a Re=10,000 to 1 m/s (Re=100,000) and .01 m/s (Re=1,000).Investigation of Turbulence Boundary ConditionInvestigation of Turbulence Boundary Condition
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Investigation of Turbulence Boundary Condition
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Examines the affect of varying the turbulent inlet length scale for the optimal geometry.Uniform Energy Dissipation Rate Approach in Determining Optimal GeometryUniform Energy Dissipation Rate Approach in Determining Optimal Geometry
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Uniform Energy Dissipation Rate Approach in Determining Optimal Geometry
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Determines the optimal geometry for the flocculation tank by varying the fh/bs, and ch/bs ratios.Performance Parameter Approach in Determining Optimal GeometryPerformance Parameter Approach in Determining Optimal Geometry
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Performance Parameter Approach in Determining Optimal Geometry
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Determines the optimal fh/bs ratio for the flocculation tank height by comparing performance parameters which quantify flocculation collision potential
Spring 2008 Research Topics
- Model and validate a simple 180 degree turn over two baffles:*
- Create fully second order accurate model
- Perform mesh sensitivity analysis (using coarse, medium and fine meshes)
- Model the baffles using alternate Turbulence models (K-e Standard, K-e Realizable, K-w)
- Analyze the effects of changing the baffle clearance height
- Understand and analyze the relationship between Strain Rate, Energy Dissipation and Kinematic Viscosity
- Create a flexible mesh that uses parametrization to easily change geometry dimensions
- Analyze the effect of the Reynolds Number on the results
- Analyze the sensitivity of the model to convergence residuals
- Model flocculation tank and compare Simulation to Experimental results.*
Spring 2008 Documentations:
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Other Information
- Flocculator with multiple baffles
- Automation of Mesh Creation
- Nondimensional Analysis
- Johannes Haarhoff and Jeremia J. van der Walt , J Water SRT - Aqua 50 (2001) 149-160 - - Towards optimal design parameters for around-the-end hydraulic flocculators.
- Relation of Shear Stresses to Floc Strength
- CFD Flocculation Tank Simulation Research
- CFD Fall 2008 Midtem Report
- CFD Spring 2008 Midterm Teach-in Presentation
- CFD Spring 2008 Final Report
- CFD Fall 2008 Midterm Teach-in Presentation
- CFD Fall 2008 Midtem Report
- CFD Fall 2008 Final Report
- CFD Flocculation Tank Next Semester Quiz