Results 91 to 100 of about 1,767 (217)

Triggering in Thermoacoustics

International Journal of Spray and Combustion Dynamics, 2012
Under certain conditions, the flow in a combustion chamber can sustain large amplitude oscillations even when its steady state is linearly stable. Experimental studies show that these large oscillations can sometimes be triggered by very low levels of background noise. This theoretical paper sets out the conditions that are necessary for triggering to
openaire   +1 more source

In vivo functional photoacoustic imaging of brain tumor vasculature [PDF]

, 2006
We present a study of the functional photoacoustic imaging of tumor hypoxia in mice in vivo. Based on spectroscopic photoacoustic tomography that detects the optical absorption of oxy- and deoxy-hemoglobins, the blood oxygen saturation and the ...
Li, Meng-Lin, Oh, Jung-Taek, Stoica, George, Wang, Lihong V., Xie, Xueyi   +4 more
core  

Numerical Solution of the Inverse Thermoacoustics Problem Using QFT and Gradient Method

Fractal and Fractional
In this research, we consider the inverse problem for the wave equation under an unknown initial condition. A generalized solution to the direct problem was formulated, its correctness was established, and the stability assessment was obtained.
Syrym E. Kasenov, Aigerim M. Tleulesova, Almas N. Temirbekov, Zholaman M. Bektemessov, Rysbike A. Asanova   +4 more
doaj   +1 more source

Towards very high resolution imaging in ultrasound-modulated optical tomography of biological tissues [PDF]

, 2006
We explored the possibility of applying very high ultrasound frequencies to achieve very high resolution in ultrasound-modulated optical tomography of soft biological tissues.
Kothapalli, Sri-Rajasekhar, Sakadžić, Sava, Wang, Lihong V.   +2 more
core  

Three-dimensional photoacoustic imaging of subcutaneous microvasculature in vivo [PDF]

, 2006
Three-dimensional photoacoustic imaging of subcutaneous microvasculature in small animals is realized in vivo using photoacoustic microscopy. Previously, degraded lateral resolution in the out-of-focus region made three-dimensional visualization ...
Li, Meng-Lin, Maslov, Konstantin, Stoica, George, Wang, Lihong V., Zhang, Hao F.   +4 more
core  

Photoacoustic tomography with a virtual point detector [PDF]

, 2007
We devise and explore a ring-shaped acoustic detector associated with a virtual point detector concept for photoacoustic tomography. The center of the ring transducer scans a circle around the object to be imaged and then is treated as an omni ...
Li, Meng-Lin, Wang, Lihong V., Yang, Xinmai   +2 more
core  

Nusselt and Reynolds numbers correlation for oscillatory flow of thermoacoustics over heated tube banks

International Journal of Thermofluids
The back-and-forth motion characteristic of the oscillatory flow brings complexity in predicting the heat transfer nature for thermoacoustic wave conditions. Investigating this is crucial as the flow forms the backbone for the thermodynamic cycles of its
Aw Lin Chou, Fatimah Al Zahrah Mohd Saat, Fadhilah Shikh Anuar, Ahmed Hamood   +3 more
doaj   +1 more source

Boundaries of thermoacoustic instability in the thermoacoustic engine with cryogenic cooling [PDF]

Journal International Academy of Refrigeration, 2020
E.A. Zinoviev, G.V. Vorotnikov, A.I. Dovgyallo, S.O. Nekrasova   +3 more
openaire   +1 more source

Operating characteristics of a standing-wave, liquid-piston thermoacoustic engine with phase-change

Results in Engineering
Low-grade heat from industrial waste streams, solar-thermal and geothermal, represents a significant energy source currently under-utilized. Phase-Change Thermoacoustic Engines, also known as Wet Thermoacoustic Engines (WTE) consist of a stack (porous ...
Ido Ben-Hertzel, Nathan Blanc, Avishai Meir, Guy Z. Ramon   +3 more
doaj   +1 more source

Photoacoustic Doppler flowmetry [PDF]

, 2008
We report flow measurements based on the photoacoustic Doppler effect. We have performed flow experiments with a suspension of micrometer carbon particles and have detected the photoacoustic Doppler shift at various average flow speeds.
Fang, Hui, Wang, Lihong V.
core