Experiments in Fluids
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The structure of compressible starting vortices
Experiments in Fluids - - 1994
The structures of highly two-dimensional shock-induced compressible starting vortices were investigated. Density distributions across the vortex were measured by dual-pulsed holographic interferometry. Pressure profiles of the vortex were measured by fast-response miniature Kulite transducers. From these two independent measurements the velocity profile was calculated using the radial momentum equ...... hiện toàn bộ
Visualization of steady streaming near oscillating spheroids
Experiments in Fluids - Tập 42 - Trang 111-121 - 2006
Experimental studies of steady streaming flows are presented for spheroids of various aspect ratios oscillating in a viscous fluid along their axis of symmetry at Reynolds numbers up to 150 and normalized oscillation amplitudes up to 1.2. The steady streaming component of the flow is visualized using phase-locked particle pathline images along the central plane of the spheroid. The extent of the i...... hiện toàn bộ
Characterizing developing adverse pressure gradient flows subject to surface roughness
Experiments in Fluids - Tập 48 - Trang 663-677 - 2009
An experimental study was conducted to examine the effects of surface roughness and adverse pressure gradient (APG) on the development of a turbulent boundary layer. Hot-wire anemometry measurements were carried out using single and X-wire probes in all regions of a developing APG flow in an open return wind tunnel test section. The same experimental conditions (i.e., T
∞, ...... hiện toàn bộ
Sizing of sand and ash particles using their speckle pattern: influence of particle opacity
Experiments in Fluids - Tập 58 - Trang 1-8 - 2017
A speckle pattern is an interference pattern produced by coherent light scattered from an irregular particle. This pattern is observed in the out-of-focus plane of the particle and it can be used to obtain information about the particle size. When the particle is observed in focus, several bright spots known as glare points are observed on its surface. They correspond to the points from which the ...... hiện toàn bộ
Density measurement of supersonic airflow using decay characteristics of FLEET emission
Experiments in Fluids - Tập 64 - Trang 1-15 - 2023
A method that involves the use of a femtosecond laser can be utilized for nonintrusive measurement of supersonic airflow without seeding any additional molecules. In the present study, the feasibility of using this method to measure the density in supersonic airflows is investigated. In the experiments, a laser filament is created in underexpanded jets by focusing a femtosecond laser through a len...... hiện toàn bộ
Power-Spectral density estimate of the Bloor-Gerrard instability in flows around circular cylinders
Experiments in Fluids - Tập 50 - Trang 527-534 - 2010
There have been differences in the literature concerning the power law relationship between the Bloor-Gerrard instability frequency of the separated shear layer from the circular cylinder, the Bénard-von Kármán vortex shedding frequency and the Reynolds number. Most previous experiments have shown a significant degree of scatter in the measurement of the development of the shear layer vortices. Sh...... hiện toàn bộ
Optical spinning rheometry test on viscosity curves of less viscous fluids at low shear rate range
Experiments in Fluids - Tập 64 - Trang 1-13 - 2023
We propose a method, named optical spinning rheometry (OSR), to acquire kinematic viscosity curves of Newtonian and non-Newtonian fluids in the same framework. The OSR is independent of torque measurements and utilizes velocity information measured by particle tracking velocimetry. This optical approach enables flexibility in velocity resolution, and benefits exploring the low shear rate region. I...... hiện toàn bộ
Đo lường đồng thời kích thước và vận tốc của bọt khí trong quá trình đầu tiên của sự hình thành bọt khí bằng cách sử dụng hình ảnh laser giao thoa Dịch bởi AI
Experiments in Fluids - Tập 50 - Trang 1153-1167 - 2011
Trong nghiên cứu này, phương pháp đo kích thước giọt bằng hình ảnh laser giao thoa (ILIDS) được áp dụng để nghiên cứu sự hình thành bọt khí mới xuất hiện trong luồng nước phía sau mô hình chân vịt thủy. Mục đích của nghiên cứu là đánh giá đồng thời vận tốc và đường kính của các bọt khí. Đến thời điểm hiện tại, tính khả thi của kỹ thuật này đã được chứng minh, đặc biệt là trong các phun sương của g...... hiện toàn bộ
#hình ảnh laser giao thoa #đo kích thước giọt #bọt khí #chân vịt #luồng nước
A four-sensor hot-wire probe system for three-component velocity measurement
Experiments in Fluids - Tập 24 - Trang 416-423 - 1998
A velocity measurement system based on a miniature four-sensor hot-wire probe capable of simultaneous three-component measurements throughout a wide range of flow angles has been developed. The calibration technique allows measurements to be made throughout the acceptance cone of the probe without being restricted by the errors associated with analytic angle response equations. This technique is ...... hiện toàn bộ
Publisher Correction: From drop impact physics to spray cooling models: a critical review
Experiments in Fluids - Tập 59 - Trang 1-1 - 2018
The article category has been published incorrectly due to processing error. The correct category should read “Review Article”. We apologize for this lapse.
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