Numerical study of dean vortices in u tubes of finite aspect ratios

... Dean number are further investigated with substantiating findings to justify the results obtained Finally, the gradual transition from multiple vortex pairs to a single pair of counter-rotating ... means for such procedures However, constraints in flexibility and sealing of the Chapter Introduction annular flow system inhibit the practical usage of such a method Thus, the use of Dean vortices ... branch, no grid dependence study was conducted for the other solution branches Such a procedure, if undertaken, would definitely incur a tremendous amount of computing resources and time Therefore,...

Numerical study of hemodynamics and gas transport in arterioles

... gas transport in arterioles through altering gas transport properties of cells or diffusion dynamics of individual gasses This study aims to investigate the effect of hemodynamics on gas transport ... membrane of RBC and the h is size of lattice The implementation of the Flood-fill method consists of three steps: initializing the index field, drawing the boundary, and filling the interior In the initialization ... domain near the membrane of RBC The Flood-fill method assigns index value of 0.0 to the interior domain and 1.0 to the exterior domain in order to separate two domains in the index field Thus, index...

Numerical study of plunging wave in deep water

... simulation of wave plunging 120 4.2 Overall wave plunging process 122 4.3 Characterization of wave breaking 128 4.4 Kinematics of the plunging jet at the initial stage of wave ... verification of a numerical wave tank Chapter focuses on the detailed simulation of the wave plunging process and a detailed analysis of the physics of wave plunging, including the plunging jet formation, ... Chapter Introduction Waves break in the ocean usually in the form of spilling and plunging breakers in both deep and shallow water, but most common in shallow water Collapsing and surging breakers...

A numerical study of fluid flow and mass transport in a microchannel bioreactor

... theoretical information on mass transport A systematic study is needed to investigate the effects of various important parameters on the fluid flow and mass transport in microchannel bioreactors ... increasing fluid- phase endocytosis; and they are capable of producing intracellular actin and myosin filaments that are oriented in the flow direction Eskin et al (1984) investigated the shear ... governing equations and the numerical methods for the present simulations In Chapter 3, the numerical analysis of fluid flow and mass transfer in a threedimensional flat-plate microchannel bioreactor...

A numerical study of heat and mass transfer in porous fluid coupled domains

... Ochoa-Tapia and Whitaker’s stress jump conditions for the flow, heat and mass transfer in porous/ fluid coupled domains, and to investigate their effects on local and global heat and mass transfer; ... incorporated with heat or mass transfer There are also limited numerical experiments and systematic results for heat and mass transfer in porous/ fluid coupled domains for certain numerical applications ... Interface Conditions For heat transfer interface conditions, usually continuities of temperature and heat flux are required (Neale and Nader, 1974; Vafai and Thiyagaraja, 1987; OchoaTapia and Whitaker,...

A NUMERICAL STUDY OF SWIRLING FLOW AND OXYGEN TRANSPORT IN a MICRO BIOREACTOR

... was to investigate the swirling flow and oxygen transport in a stirred micro- bioreactor A numerical model was developed to investigate the flow field and mass transport in a micro- bioreactor in ... Swirling Flow and Mass Transfer in a Micro- Bioreactor with Partially Rotating End-Wall 79 5.1 Numerical Model 80 5.2 Vortex Breakdown in a Micro- Bioreactor with Partially Rotating End-Wall 83 ... Hydrodynamic Stress in Stirred Bioreactors 1.2.3 Mass Transport in Stirred Bioreactors 1.2.4 Swirling Flow and Vortex Breakdown in Micro- Bioreactors 12 1.2.5 Flow and Mass Transport in Bioreactors...

A numerical study of wave propagation in poroelastic media by use of the localized differential quadrature (LDQ) method

... simulate wave propagation in a poroelastic medium First, the theory of propagation of elastic waves in fluid-saturated poroelastic media and the localized differential quadrature (LDQ) method are ... and the localized differential quadrature method 2.1 General The theory of propagation of elastic waves in fluid-saturated poroelastic media was originally established by Biot (195 6a) in a system ... compare the wave scattering characteristics 1.4 Outline of the thesis Chapter presents the theory of propagation of elastic waves in fluid-saturated porous media and the proposed localized differential...

Numerical study of a large diameter shaft in old alluvium

... degree of saturation Ssat Saturated degree of saturation Sres Residual saturation T Temperature TA Transmissivity of aquifer t Thickness of shaft lining V Maximum shear at final excavated depth in ... environments of deposits of Old Alluvium in Singapore appeared to correlate well with the Alluvial Complex in Singkep and Bangka of Indonesia The maximum recorded depth of the Old Alluvium in Singapore ... NUMERICAL STUDY OF A LARGE DIAMETER SHAFT IN OLD ALLUVIUM TAN RWE YUN (B Eng (Hons.), NUS) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF CIVIL ENGINEERING NATIONAL...

Numerical study of the heat transfer in a miniature joule thomson cooler

... predict the characteristics of the cryogen, argon along the helical coil capillary tube on a miniature J-T cryocooler; ii To validate the simulation results against the experimental data obtained ... Variation of Argon Specific Heat against Temperature 63 Figure 4.3 Variation of Argon Entropy against Temperature 64 Figure 4.4 Variation of Argon Enthalpy against Temperature 64 Figure 4.5 Variation ... Advantages & Disadvantages of Store Expendable cryogen Advantages Disadvantages Reliable and absolute guaranteed Inevitable loss of the cryogen due to cooling for a predictable period heat leaks...

Báo cáo "Numerical study of long wave runup on a conical island " pdf

... there was a conical island setup in a wave basin having the dimension of 30 m wide and 25 m long. The conical island has the shape of a truncated cone with diameters of 7.2 m at ... practical problems related to long waves, such as inundation of tsunami on coastal areas. Simulated results in this study also confirm that the area behind an island can be attacked ... the model developed in this study has potential features to apply to the study of practical problems related with long waves, such as inundation of tsunami on coastal areas. Fig. 4. Snapshots of the water surface displacement due to the solitary wave. ...

numerical study of optical nanolithography using nanoscale bow tie shaped nano apertures

... general design rule for using bowtie apertures for nanolithography On the other hand, there are many process difficulties to overcome, such as accurate fabrication of bow- tie apertures and maintaining ... Toward nanometer-scale optical photolithography: utilizing the near-field of bowtie optical nanoantennas Nano Lett 6, 355–360 Wang, L., Uppuluri, S.M., Jin, E.X & Xu, X (2006) Nanolithography using ... Given the fact that the depth of nanolithography is normally less than 50 nm (Wang et al., 2006), the bow- tie apertures offer the advantage for nanolithography in terms of having a higher imaging...

Numerical study of pile capacity considering installation and negative

... NUMERICAL STUDY OF PILE CAPACITY CONSIDERING INSTALLATION AND NEGATIVE SKIN FRICTION EFFECTS SUN JIE (BEng,MEng, Southeast University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... stress and strain state of deforming soil around piles compared with non-displacement piles Numerical modeling of displacement pile installation effects becomes a difficult task and a lot of numerical ... term capacity of the pile is a function of the re-consolidation process modifying the effective stresses after the pile installation, especially for displacement piles (driven piles and Jack-in piles)...

Numerical study of suction embedded plate anchor

... anchors 1.2.5 Suction embedded plated anchors 1.2.6 Dynamically penetrated anchors 1.3 Suction embedded plate anchor 1.4 Objectives and scope of study 1.5 Thesis ... square plate anchor with B/t=20 190 xiii List of Symbols A Section area of plate anchor B Width of the plate anchor Cθ Constant which varies with anchor geometry d Chain diameter D Diameter of ... 1.2.5 Suction embedded plated anchors Suction embedded plate anchor (SEPLA) comprises a plate anchor that is penetrated in a vertical orientation using a caisson A typical SEPLA consists of a...

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A numerical study of airflow through human upper airways

... distortion of anterior nasal airway was found to have much larger impact on nasal airflow patterns than middle and posterior nasal airway (Garcia et al., 2010) Deviated nose, referring to appearance of ... sectional area around sinus ostia at peak inspiration and peak expiration 120 Figure 6.1 (a) Sagittal image of human upper airway The fluid domain consists of the nasal cavity, the nasopharynx ... at nasal valve and turbinate end and nasal resistance in left and right airways 82 Table 4.4 Minimum cross sectional areas (MCAs) of left and right airways around the nasal valve...

Numerical study of metal matrix nanocomposites using discrete dislocation approach

... NUMERICAL STUDY OF METAL MATRIX NANOCOMPOSITES USING DISCRETE DISLOCATION APPROACH ELLIOT LAW (B Eng (Civil) (Hons), NUS) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... Material properties of constituent phases 132 4.6 Nature of dislocation pile-ups in metallic nanocomposites 137 v Simulation of damage in metal matrix nanocomposites 141 5.1 Damage of inclusions 144 ... response of metallic matrix for different values of ρobs with τobs of (a) 0.15 GPa, and (b) 1.20 GPa 75 Figure 3.8 Deformation of RVE and distribution of dislocations within metallic matrix with...

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