Stability of Gas Bubbles in a Deformable Material Containing Dissolved Gases

This paper analyzes the stability of gas bubbles in a medium which contains dissolved gases and deforms due to creep. The effects of mass diffusion and surface tension on the dynamic behavior of a gas bubble are taken into account. Asymptotic solutions valid for large times are obtained which predict the radius‐time relation, the creep rate, and the rate of diffusion of dissolved gases induced by the growth of a gas bubble in an oversaturated solution. The case where the bubble is situated in a saturated or undersaturated solution is also examined.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/70460/2/JCPSA6-56-4-1610-1.pd

Effects of suction and blowing on oscillatory boundary layers over cylinders

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76977/1/AIAA-3140-792.pd

Reliability of Heat Sink Optimization Using Entropy Generation Minimization

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76530/1/AIAA-2002-3216-523.pd

Influence of fluctuating circulations on the transport phenomena from cylinders including uniform suction or blowing

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76606/1/AIAA-2938-587.pd

Effect of Heat Flux Ratio from both Side-walls on Thermal-fluid Flow in Channel

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76163/1/AIAA-2002-2873-281.pd

Effect of Heat Flux Ratio on Two-Dimensional Horizontal Channel Flow

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76088/1/AIAA-9125-292.pd

Gas-liquid mass transfer in a multi-stage perforated-disk type stirring cascade

Experimental study is conducted to determine interphase mass transfer of a solute (carbon dioxide) in gas-liquid systems (air and water) in counter-current flow through a three-stage perforated-disk type stirring cascade. Test results over the entire cascade can be correlated as wherein NTU, jD and g are the number of transfer unit, modified mass transfer factor and gas flow rate, respectively, based on the liquid phase (f). The subcript [infinity] denotes an asymptotic value. The criterion corresponding to the state of overflow limit is determined by a certain value of the separation factor A (using the subscript fl for overflow limit) beyond which the stirrer is flooded with the gas resulting in undersirable dispersion and high power requirement. Within the range of A = Afl, the overall mass-transfer performance may be predicted by NTUf = jDfSc-2/3f = 1.03 x 10-4A0.6Re0.449r in which Scf is the liquid-phase Schmidt number and Rer expressed the impeller (disk) Reynolds number.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/21687/1/0000078.pd

Nucleate-boiling type evaporation of binary-liquid drops on heated surfaces

A binary-liquid drop evaporates on a heated surface in the nucleate-boiling type vaporization regime taking into account the effect of drop geometry. A maximal slowing down of drop evaporation is disclosed together with the occurence of a minimum surface-drop heat flux at different concentrations of the more volatile component. These phenomena are observed both theoretically and experimentally. Since the nucleate-boiling vaporization regime gives a minimum drop lifetime resulting in quicker vaporization (i.e. the best operating condition) and the rate of vapor formation together with air motion controls the combustion rate, the disclosure may be of some use in application to the regulation of the combustion rate in compression-ignition engines and oil-fired appliances.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/21647/1/0000031.pd

Momentum, heat and mass transfer in logarithmic spiral flows of incompressible viscous fluids

This paper presents a theoretical investigation of the transfer of momentum, heat and mass in incompressible viscous flow through a logarithmic spiral channel. The velocity, temperature and concentration profiles are calculated by the direct integration of the ordinary differential equations obtained from the governing transfer equations by means of the similarity transformation technique. Numerical results are obtained for the shear stress and the rates of heat and mass transfer at the channel walls. As a special case, the analytical solution in a closed form is given for circular Couette flow. Results may be applied to the vapor-heated Rosenblad-type spiral plate heat exchanger and the cooling of bearings.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/32097/1/0000147.pd

Nucleate Pool Boiling on Copper Graphite Composite Surfaces and Its Enhancement Mechanism

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76901/1/AIAA-1103-516.pd