Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 61 for “"Flow channel"”.
-
An Experimental Study of Subcooled Flow Boiling at Elevated Pressure in an Annular Flow Channel
… was developed to study the region of subcooled flow boiling. Multiple studies were carried out to investigate the effects of liquid velocity, pressure, and temperature on the boiling heat transfer of subcooled fluid flowing through a heated annular channel. Water was used as the working fluid …
-
Optimisation of a linear flow channel reactor for semi-passive, simultaneous biological sulphate reduction and partial sulphide oxidation
… that are generated from diffuse sources, as low-flow ARD. Low-flow ARD and neutral rock drainage are amenable to biological treatment of the sulphate component using sulphate reducing bacteria (SRB). Biological sulphate reduction (BSR) generates sulphide, which requires further treatment to …
-
A novel semi-passive process for sulphate removal and elemental sulphur recovery centred on a hybrid linear flow channel reactor
… high partial oxidation rates in a linear flow channel reactor (LFCR) has been described. The use of a floating sulphur biofilm overcomes many of the drawbacks associated with conventional sulphide oxidation technologies that are costly and require precise operational control to maintain …
-
Investigation of alternative carbon sources for the biological treatment of synthetic sulphate-laden water and mine impacted water in a linear flow channel reactor
… of these processes. A semi-passive linear flow channel reactor (LFCR) which simultaneously reduces sulphate to sulphide using sulphate reducing bacteria (SRB) and partially oxidises the sulphide formed to elemental sulphur using sulphur oxidising bacteria (SOB) within a floating sulphur …
-
Design, Fabrication and Characterization of a Microfluidic Device for Ultrasound-based Cell Sorting
… tags. A microfluidic device consisting of a flow channel was developed for effectively performing MiCS. The device was designed with the aim of obtaining traveling waves in the flow channel by using various design considerations and Finite Element Analysis (FEA) simulations. Placing the flow …
-
Experimental and numerical analysis of fuel cells
… studies and numerical simulations on PEMFC gas flow channel, the determination of the impact of the single channel fuel cell are presented. Furthermore, preliminary study is done for the application of APS (Air Plasma Spray) to SOFC and adhesion of anode and cathode with electrolytes for the …
-
Numerical optimisation and theoretical analysis of complex microchannel heat exchangers
… and steady state laminar incompressible fluid flow. Microchannel heat sinks used were numerically modelled from highly conductive (aluminium) solid material substrate. ANSYS FLUENT Response Surface Optimisation Tool (RSO) was used to numerically optimise and compare the performance of combined …
-
Flow and transport in wetland deposits
… is known about the mechanisms that control flow and transport through wetland deposits. Therefore, the objective of this research was to investigate the factors that influenced flow in wetland soils. To accomplish this, Column Experiments, run on a specialized permeameter, were conducted on …
-
STUDY OF AIR BUBBLE INJECTION INTO LAMINAR AND TURBULENT WATER FLOW THROUGH AN ANNULAR TEST SECTION
Injection of bubbles into a vertical upward flow of water in an annular flow channel was studied experimentally under laminar and turbulent conditions. In order to measure the size and shape of the bubbles, a flow visualization system was set up in a vertical test section with a high speed video …
-
Development and characterization of a hydrogen peroxide sensor using catalase immobilized on a pyroelectric poly(vinylidene fluoride) film
… on an enzyme. The enzyme is immobilized in a flow channel with a pyroelectric polymer film, poly(vinylidene fluoride) or PVDF. The sample is introduced into the flow channel using flow injection analysis technology. The heat from the reaction causes the pyroelectric material to produce an …
-
Water Management Diagnostics of a Proton Exchange Membrane Fuel Cell Using Magnetic Resonance Imaging
A final finding is that surface defects in the flow field impact the water distribution pattern. To the author's knowledge, this is the first time the importance of flow field surface quality is considered, and its impact is found to be profound. In our system we find that defects act as 'sticking' …
-
Acoustic Standing Wave Manipulation of Particles and Cells in Microfluidic Chips
… of acoustic standing waves and the laminar flow in microfluidics has proven to be well suited for performing particle and cell separation. The fundamental acoustic separator used in this thesis consists of a microfluidic flow channel with a three way flow splitter (trifurcation) in the end …
-
Experimental investigation of two-phase instability in natural circulation with direct transient local measurement
… Direct transient local measurement of two-phase flow is performed at multiple axial locations along the flow channel with thermocouples and conductivity probes traversed by customized high-precision mechanisms. Periodic oscillation is captured when the vapor quality at the test section exit is …
-
Modeling and design of semi-solid flow batteries
… model of the recently introduced semi-solid flow battery system is developed and applied to address issues with important design and operation implications. Because of the high viscosity of semi-solid flow battery suspensions, alternative modes of operation not typically used in conventional …
-
Design of cost-optimized village-scale electrodialysis systems for brackish water desalination
… total membrane area, membrane manufacturers, and flow channel spacers. A commercial-scale ED stack was additionally tested in Chelluru, India, building confidence that the model is predictive for real groundwater, and that ED systems are feasible to operate in the rural Indian context.
-
Control of salinity intrusion caused by sea level rise
… tidal locks, and through long term stream flow augmentation are investigated for their suitability. Quantification of the extent of the impacts is accomplished by means of computer model simulations. A laterally integrated two-dimensional. time dependent. finite difference numerical model …
-
Mitigating fouling of heat exchangers with fluoropolymer coatings
… °C. A microfluidic system with a 650 x 2000 µm flow channel enables fouling studies to be carried out by recirculating 2 l of raw milk. The apparatus operates in the laminar flow regime and the capability to probe the local composition of delicate fouling deposit $\textit{in-situ}$ with …
-
Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration
… a small micro-fluidic device that incorporates a flow channel with an imprinted homogeneous pore structure to replicate the porous nature of groundwater flow. Sodium carbonate and calcium chloride were injected in to this model to form a calcium carbonate precipitate. The experiment was run and …
Page 1 of 4