skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Computational Study of Turbulence and Mixing in Algae Raceway Ponds.


Abstract not provided.

; ; ;  [1]
  1. (ATP3)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the Tenth Annual Algae Biomass Summit held October 23-26, 2016 in Phoenix, AZ, United States.
Country of Publication:
United States

Citation Formats

Quiroz Arita, Carlos, Gharagozloo, Patricia E., Blaylock, Myra L., and John McGowen. Computational Study of Turbulence and Mixing in Algae Raceway Ponds.. United States: N. p., 2016. Web.
Quiroz Arita, Carlos, Gharagozloo, Patricia E., Blaylock, Myra L., & John McGowen. Computational Study of Turbulence and Mixing in Algae Raceway Ponds.. United States.
Quiroz Arita, Carlos, Gharagozloo, Patricia E., Blaylock, Myra L., and John McGowen. 2016. "Computational Study of Turbulence and Mixing in Algae Raceway Ponds.". United States. doi:.
title = {Computational Study of Turbulence and Mixing in Algae Raceway Ponds.},
author = {Quiroz Arita, Carlos and Gharagozloo, Patricia E. and Blaylock, Myra L. and John McGowen},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month =

Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • Study of the flow mixing in a novel open-channel raceway for algae production
  • A novel flow field for algae raceways has been proposed, which is fundamentally different from traditional paddlewheel-driven raceways. To reduce freezing and heat loss in the raceway during cold time, the water is drained to a deep storage canal. The ground bed of the new raceway has a low slope so that water, lifted by propeller pump, can flow down in laterally-laid serpentine channels, relying on gravitational force. The flow rate of water is controlled so that it can overflow the lateral channel walls and mix with the main flow in the next lower channel, which thus creates a bettermore » mixing. In order to optimize the design parameters of the new flow field, methods including flow visualization, local point velocity measurement, and CFD analysis were employed to investigate the flow mixing features. Different combinations of channel geometries and water velocities were evaluated. An optimized flow field design and details of flow mixing are presented. The study offers an innovative design for large scale algae growth raceways which is of significance to the algae and biofuel industry.« less
  • Cost-effective implementation of microalgae as a solar-to-chemical energy conversion platform requires extensive system optimization; computer modeling can bring this to bear. This work uses modified versions of the U.S. Environmental Protection Agency's (EPA's) Environmental Fluid Dynamics Code (EFDC) in conjunction with the U.S. Army Corp of Engineers water-quality code (CE-QUAL) to simulate hydrodynamics coupled to growth kinetics of algae (Phaeodactylum tricornutum) in open-channel raceways. The model allows the flexibility to manipulate a host of variables associated with raceway-design, algal-growth, water-quality, hydrodynamic, and atmospheric conditions. The model provides realistic results wherein growth rates follow the diurnal fluctuation of solar irradiation andmore » temperature. The greatest benefit that numerical simulation of the flow system offers is the ability to design the raceway before construction, saving considerable cost and time. Moreover, experiment operators can evaluate the impacts of various changes to system conditions (e.g., depth, temperature, flow speeds) without risking the algal biomass under study.« less
  • No abstract prepared.
  • For reactors in which a major reactant is introduced into the reactor via a spray, spray characteristics can have a significant impact on the performance of the reactor. Among the major parameters that can be used to characterize a spray are the injection velocity, angle of injection, and mean droplet size. A three-phase reacting flow computational fluid dynamic (CFD) computer code, developed by the authors, was used to study the major effects of these spray parameters on mixing, vaporization, and reaction progress in a commercial-scale fluidized catalytic cracking (FCC) riser reactor. Feed injector variations have been widely recognized in themore » oil refining industry as having a significant impact on the flow through the riser, and thus on the product yields. The process of designing nozzles and establishing optimum operating parameters has been primarily one of trial and error. Advances in numerical modeling of multiphase flows have made it possible to investigate the effects of major spray parameters on these complex reacting flows. Experimental or field data is necessary to determine reaction kinetic parameters and other parameters for analysis of particular reactor types or geometries. When they exist, local optimum operating windows for spray parameters are identified, and the sensitivity of local optimum to variation in spray parameters is also reported.« less