An Experimental Investigation of the Brinkman Layer Thickness at a Fluid-Porous Interface

2006 ◽  
pp. 445-454 ◽  
Author(s):  
Afshin Goharzadeh ◽  
Arash Saidi ◽  
Dianchang Wang ◽  
Wolfgang Merzkirc ◽  
Arzhang Khalil
Keyword(s):  
Experimental Investigation ◽  
Layer Thickness ◽  
Porous Interface

scholarly journals Experimental Investigation and Statistical Analysis of Low Frequency RFID System

2021 ◽  
Author(s):  
Shilpa Choudhary ◽  
◽  
Abhishek Sharma ◽  
Arpana Mishra ◽  
◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Statistical Analysis ◽  
Layer Thickness ◽  
Sandy Soil ◽  
Soil Layer ◽  
Low Frequency ◽  
Atmospheric Conditions ◽  
Asset Tracking ◽  
Rfid System ◽  
Read Range

In today’s era RFID system plays a key role in the field of asset tracking but its maximum read range or detectability may get degraded due to the challenges which are being provided by varying atmospheric conditions. So, to study the effect of these challenging atmospheric conditions, experimental investigation and statistical analysis of RFID system detectability has been carried out. Varying surrounding temperature, humidity and the presence of soil layer thickness in between RFID reader and tag and its five different grain sizes were considered as input parameters. All these observations were carried out for three different soils i.e. sandy soil, Silt and clay. Execution of test was carried out according to the MINITAB 17 tool. According to ANOVA analysis as well as from interaction plot it was found that soil layer thickness have more impact on RFID system read range and R2 value was found to be 96.91%, 99.64% and 99.78% for RRSS, RRS and RRC respectively. Composite desirability of optimization was found to be 0.8425. Optimum values of process parameters Temperature, Soil Layer Thickness, Relative Humidity and Soil Grain Size were found to be 303.3°K, 2.5 cm, 40.1 %, 1.92 mm respectively. Best values of responses were found to be 10.94 cm for (Read Range in presence of Clay); 11.02 cm (Read Range in presence of Silt) and 10.97 cm (Read Range in presence of Sandy Soil).

Experimental Investigation of White Layer Thickness on EDM Processed Silicon Steel Using ANFIS Approach

Silicon ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1905-1911 ◽  
Author(s):  
T. Muthuramalingam ◽  
D. Saravanakumar ◽  
L. Ganesh Babu ◽  
Nguyen Huu Phan ◽  
Vu Ngoc Pi
Keyword(s):  
Experimental Investigation ◽  
Layer Thickness ◽  
White Layer ◽  
Silicon Steel ◽  
White Layer Thickness

Turbulence Amplification in Flow About an Airfoil

1980 ◽  
Author(s):  
W. Z. Sadeh ◽  
P. P. Sullivan
Keyword(s):  
Boundary Layer ◽  
Experimental Investigation ◽  
Layer Thickness ◽  
Boundary Layer Thickness ◽  
Background Level ◽  
Turbulent Energy ◽  
Stagnation Zone ◽  
Stagnation Flow ◽  
Flow Situation ◽  
Stretching Effect

An experimental investigation of the evolution of freestream turbulence in flow about an airfoil was conducted in order to ascertain its selective amplification induced by the stretching mechanism according to the vorticity-amplification theory. Significant amplification of the streamwise turbulent energy transpired even in the limiting flow situation studied of a symmetric airfoil at zero angle of attack where the stretching is the least. Substantiation of the stretching effect was provided by the almost 100 percent amplification of turbulence with respect to its background level in the absence of the airfoil. Realization of preferred amplification at scales larger than the neutral scale of the stagnation flow was clearly indicated by the variation of the discrete streamwise turbulent energy. Particularly important was the detection of a most amplified scale which is characteristic of the coherent substructure near the airfoil stagnation zone and, concurrently, commensurate with the boundary-layer thickness.

scholarly journals Transition layer thickness at a fluid-porous interface

2005 ◽  
Vol 17 (5) ◽  
pp. 057102 ◽  
Author(s):  
Afshin Goharzadeh ◽  
Arzhang Khalili ◽  
Bo Barker Jørgensen
Keyword(s):  
Layer Thickness ◽  
Transition Layer ◽  
Porous Interface

Experimental Investigation of the Ice-Formation in a Planar Nozzle With Forced Convection Flow

2005 ◽  
Author(s):  
B. Weigand ◽  
S. Zehner ◽  
A. Knapp ◽  
R. Braun
Keyword(s):  
Experimental Investigation ◽  
Layer Thickness ◽  
Parallel Plate ◽  
Reynolds Numbers ◽  
Ice Formation ◽  
Axial Position ◽  
Convection Flow ◽  
Flow Acceleration ◽  
Forced Convection Flow ◽  
Plate Channel

The present paper deals with the ice-formation in a planar nozzle with a convergence angle of 2.5 deg. First experiments have been carried out for different wall cooling parameters B in the range between 4 to 18 and for different flow rate Reynolds numbers in the range of 5000 < Re4h < 46000. For all these experiments only smooth ice-layers could be observed. However, in a cooled parallel plate channel or a diffuser, normally wavy ice-layers are observed for the parameter range reported above. This interesting result can be seen as a first justification for the hypothesis (which has been stated in literature) that the formation of wavy ice-layers is caused by flow laminarisation (due to the rapid growth in ice-layer thickness with increasing axial position from the inlet) and retransition to the fully turbulent state (after the ice-layer thickness reaches a nearly constant value). Thus, wavy ice-layers might be suppressed by superimposing flow acceleration.

Experimental Investigations on a 1.00 m2 Solar Gel Pond

2014 ◽  
Vol 592-594 ◽  
pp. 2360-2364 ◽  
Author(s):  
Natarajan Sozhan ◽  
Thiyagarajan Senthilvelan ◽  
T. Kaliyappan ◽  
E. Vijayakrishna Rapaka ◽  
S.P. Sivapirakasam
Keyword(s):  
Experimental Investigation ◽  
Solar Energy ◽  
Layer Thickness ◽  
Storage Temperature ◽  
Experimental Investigations ◽  
Polymer Gel ◽  
Gel Layer ◽  
Storage Zone

— In the present work, a 1 m2 solar gel pond was fabricated and tested. Experiments were performed on a 1.0 m2 Solar Gel Pond area at Karaikal, Pondicherry, India (Latitude 10.55° N & Longitudinal 79.52° E). The experimental investigation were carried out in to study the influence of Upper Gel layer thickness (UGL), Salinity of Lower Convective Storage Zone (LCSZ), Depth of LCSZ on the storage temperature of the solar gel pond. The maximum storage temperature of 65.5 °C was achieved in a span of 15 days. Keywords—solar gel pond, polymer gel, storage temperature, solar energy

Sign in / Sign up

Export Citation Format

Share Document