Simulation study on surface temperature rise of rusty steel plate by laser cleaning

2021 ◽  
Author(s):  
Heli Bai ◽  
Wei Zhang ◽  
Guangyong Jin
Keyword(s):  
Surface Temperature ◽  
Simulation Study ◽  
Temperature Rise ◽  
Steel Plate ◽  
Laser Cleaning

Parametric Optimization of Dry Laser Cleaning Using Metaheuristics Processes

2021 ◽  
pp. 1-17
Author(s):  
Pritam Pain ◽  
Goutam Kumar Bose ◽  
Sayantan Roy
Keyword(s):  
Surface Temperature ◽  
Temperature Rise ◽  
Laser Power ◽  
Printed Circuit Board ◽  
Focal Length ◽  
Scanning Speed ◽  
Primary Objective ◽  
Laser Cleaning ◽  
Circuit Board ◽  
Adhesive Tape

The workpiece sample which is a copper printed circuit board (PCB) is mounted on a micro-controlled assembly with double-faced adhesive tape. Here the primary objective is to study the effect of laser cleaning parameters on surface temperature rise and thermoelastic force. The variation of instantaneous temperature rise and thermoelastic force with time using different process parameters (e.g., type of power, focal length, and scanning speed) at a constant absorption coefficient is also investigated, and the best parametric combination have been found out in this experiment. After successful completion of the experimentation, it is observed that the surface temperature increases with the increase in laser power. The maximum temperature rise is observed when the laser power is maximum, and the focal length is minimum. It is further observed that the thermoelastic force increases with the increase in laser power. Maximum thermoelastic force is observed when the laser power is maximum, and the focal length is minimum.

scholarly journals Numerical simulation study of steel plate anti-penetrating features

AIP Advances ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 095324
Author(s):  
Hongfu Qiang ◽  
Xinya Sun ◽  
Zhaojun Zhu ◽  
Huang Quanzhang ◽  
Shang Hehao
Keyword(s):  
Numerical Simulation ◽  
Simulation Study ◽  
Steel Plate

scholarly journals Design of floating photovoltaic system for fish pond lighting

2021 ◽  
Vol 926 (1) ◽  
pp. 012005
Author(s):  
G S H Arimufti ◽  
W Sunanda ◽  
R F Gusa
Keyword(s):  
Surface Temperature ◽  
Water Temperature ◽  
Temperature Rise ◽  
Solar Irradiance ◽  
Output Voltage ◽  
Pond Water ◽  
Photovoltaic System ◽  
Fish Pond ◽  
Photovoltaic Panel

Abstract The floating photovoltaic panel is increasingly being used. This is one of the ways to reduce temperature rise in photovoltaic panel. The floating photovoltaic panel is used for lighting at the fish pond. A unit of 8-watt lamp for lighting supplied by 1 unit of 50 Wp photovoltaic panel and 1 unit of 12 V/3.5 Ah battery. The heatsink attached to the bottom of the floating photovoltaic panel transfers heat from the panel to the fish pond water. Sensors are connected to Arduino to measure photovoltaic panel output voltage and current, solar irradiance, photovoltaic panel temperature and fish pond water temperature. From the measurement, the voltage generated from the floating photovoltaic panel is 12.71 – 14.71 V and the current is 0.15 - 1.17 A. While the solar irradiance value is 71 W/m2 to 396 W/m2, the surface temperature of photovoltaic panel is 26.9°C - 32.4°C and fish pond water temperature is 27.1°C - 30.2°C.

scholarly journals Estimates of climate system properties incorporating recent climate change

2018 ◽  
Vol 4 (1/2) ◽  
pp. 19-36 ◽  
Author(s):  
Alex G. Libardoni ◽  
Chris E. Forest ◽  
Andrei P. Sokolov ◽  
Erwan Monier
Keyword(s):  
Climate Change ◽  
Surface Temperature ◽  
21St Century ◽  
Climate Sensitivity ◽  
Temperature Rise ◽  
Heat Content ◽  
Climate System ◽  
Model Parameters ◽  
Aerosol Forcing ◽  
Global Mean

Abstract. Historical time series of surface temperature and ocean heat content changes are commonly used metrics to diagnose climate change and estimate properties of the climate system. We show that recent trends, namely the slowing of surface temperature rise at the beginning of the 21st century and the acceleration of heat stored in the deep ocean, have a substantial impact on these estimates. Using the Massachusetts Institute of Technology Earth System Model (MESM), we vary three model parameters that influence the behavior of the climate system: effective climate sensitivity (ECS), the effective ocean diffusivity of heat anomalies by all mixing processes (Kv), and the net anthropogenic aerosol forcing scaling factor. Each model run is compared to observed changes in decadal mean surface temperature anomalies and the trend in global mean ocean heat content change to derive a joint probability distribution function for the model parameters. Marginal distributions for individual parameters are found by integrating over the other two parameters. To investigate how the inclusion of recent temperature changes affects our estimates, we systematically include additional data by choosing periods that end in 1990, 2000, and 2010. We find that estimates of ECS increase in response to rising global surface temperatures when data beyond 1990 are included, but due to the slowdown of surface temperature rise in the early 21st century, estimates when using data up to 2000 are greater than when data up to 2010 are used. We also show that estimates of Kv increase in response to the acceleration of heat stored in the ocean as data beyond 1990 are included. Further, we highlight how including spatial patterns of surface temperature change modifies the estimates. We show that including latitudinal structure in the climate change signal impacts properties with spatial dependence, namely the aerosol forcing pattern, more than properties defined for the global mean, climate sensitivity, and ocean diffusivity.

scholarly journals Milking-related changes of teat temperature caused by various milking machines

2008 ◽  
Vol 53 (No. 4) ◽  
pp. 121-125 ◽  
Author(s):  
J. Vegricht ◽  
A. Machálek ◽  
P. Ambrož ◽  
U. Brehme ◽  
S. Rose
Keyword(s):  
Surface Temperature ◽  
Temperature Rise ◽  
Temperature Fluctuation ◽  
Blood Circulation ◽  
Average Temperature ◽  
Before And After ◽  
Working Quality

The aim of the performed work was to verify the hypothesis that different milking equipments have different influence on the blood circulation in the milk gland during milking. This influence was investigated by measuring the surface temperature of the milk gland using thermography. The influence was monitored of 5 different milking units in total, out of them 2 AMS, on the teat temperature which was scanned and evaluated in the teat tip centre and on the teat base at the same time with the surface temperature of the udder, always at the instant closely preceding the cluster application and then after its removal. It was ascertained that the average temperature of the teat tip after milking was increased in comparison with the temperature before milking practically in all the milking units monitored. At the same time, the average temperature of the teat tip in the milking equipment in parlours increased by about 1.7°C–2.7°C (6.1%–9.0%) as compared to the temperature before milking. At milking in AMS, the temperature rise of the teat tip was smaller and reached only 0.9°C–1.7°C (2.9%–6.0%). At the same time, the temperature of other parts of the milk gland grew commensurately. It was also found that differences exist between different milking units with respect to their influence on the temperature fluctuation of the milk gland. From the monitoring performed up to now and from the results acquired it is possible to apprehend that the monitoring of the teat temperature before and after milking with the help of thermography can become an indicator of the working quality of the milking equipment and its influence on the milk gland. The confirmation of this hypothesis requires, however, further detailed and extensive measuring to be carried out.

Surface Temperature in Oscillating Sliding Interfaces

2004 ◽  
Author(s):  
M. Mansouri ◽  
M. M. Khonsari
Keyword(s):  
Surface Temperature ◽  
Biot Number ◽  
Temperature Rise ◽  
Peclet Number ◽  
Oscillatory Motion ◽  
Péclet Number ◽  
Dimensionless Groups ◽  
Contact Width ◽  
Sliding Interfaces ◽  
Independent Parameters

A model is developed to predict the behavior of two sliding bodies undergoing oscillatory motion. A set of four dimensionless groups is introduced to characterize the transient dimensionless surface temperature rise. They are: the Peclet number Pe, the Biot number Bi, the amplitude of oscillation A, and the Hertzian semi-contact width α. Also considered in the analysis is the effect of the ratio β = A/α of the amplitude to the semi-contact width. The results of a series of simulations, covering a range of these independent parameters, are presented and examples are provided to illuminated the utility of the model.

Vascular convection of heat from active muscle to overlying skin

1959 ◽  
Vol 14 (2) ◽  
pp. 207-211 ◽  
Author(s):  
Theodore Cooper ◽  
Walter C. Randall ◽  
Alrick B. Hertzman
Keyword(s):  
Temperature Gradient ◽  
Surface Temperature ◽  
Temperature Rise ◽  
Active Muscle ◽  
Temperature Changes ◽  
Contracting Muscle ◽  
Arterial Perfusion ◽  
Arterial Dilation ◽  
Absence Of Evidence

Both thermocouple and radiometer measurements revealed marked elevations in temperature of skin immediately over actively working muscles of the forearm and leg. Such localized increases in the surface temperature were confined to skin overlying rhythmically contracting muscle. They were attributed to a direct vertical vascular convection of heat from the muscle to the overlying skin because they were prevented by blocking perfusion or by surgical severance of skin from underlying tissue and because of the character of the temperature gradient in the intervening tissue. The argument for a venous rather than an arterial convection was based on a) the effects of compression of the superficial veins on the temperature changes, b) the absence of effect on the latter by electrophoresis of adrenaline into the skin, which greatly reduced arterial perfusion of the skin, c) the absence of evidence of arterial dilation in the skin and d) the lack of relation of the location of arterial twigs to the topography of the temperature rise. Submitted on August 11, 1958

Sign in / Sign up

Export Citation Format

Share Document