A Temperature and Humidity Study of Citrus Rust Mite 1 Employing a Constant Humidity Air-flow Technique 2

1974 ◽  
Vol 3 (5) ◽  
pp. 813-822 ◽  
Author(s):  
R. F. Hobza ◽  
L. R. Jeppson
Keyword(s):  
Air Flow ◽  
Temperature And Humidity ◽  
Citrus Rust Mite

The Influence of Temperature and Humidity on the ABS Contaminations

2014 ◽  
Author(s):  
Fuhao Cui ◽  
Jinhong Hu ◽  
Yue Peng ◽  
Hui Li ◽  
Shengnan Shen ◽  
...  
Keyword(s):  
Shear Stress ◽  
Flow Pattern ◽  
Air Flow ◽  
Disk Drive ◽  
Flying Height ◽  
Flow Shear ◽  
Slip Boundary ◽  
Temperature And Humidity ◽  
Flow Shear Stress ◽  
The Impact

In order to increase the areal recording density of hard disk drive beyond 1 Tb/in2, the flying height has to be reduced to several nanometers. At such a low flying height, particles and lube contaminations, which could lead to a transient vibration and flying height modulation in a hard disk drive, are becoming more and more serious. In this work, it studies the influence of temperature and humidity on the air flow pattern, velocity and shear stress distribution on the air bearing surface (ABS) of slider using a self-developed simulator. It first solves the generalized steady state Reynolds equation with slip boundary conditions. Then it solves the reduced Navier-Stokes (N-S) equation with slip boundary conditions to get the air velocity distribution, i.e., identify the air flow pattern on the ABS. The stagnation lines and areas of air flow are calculated to judge the contamination area. On the other hand, it calculates the air shear stress distribution on the ABS since the air shear stress is the main driving force for the lubricant and particles migration and contaminations. After that, the impact of the temperature and humidity on the air flow pattern is analyzed by applying the Sutherland equation and mixed gas viscosity calculation equation. The simulation results indicate that the impact of temperature and humidity on the air flow pattern is un-conspicuous. However, the peak velocity of the air flow, which contains no vapor, reduces almost 10%, and the peak air flow shear stress increases less than 1.5%, with the increase of operational temperature from 298.15 K to 343.15 K. In addition, the peak velocity of the air flow increasing almost 4%, and the peak air flow shear stress keeps almost same, with the increase of the operational mole fraction of vapor from 5% to 15%.

AIR FLOW, TEMPERATURE AND HUMIDITY PATTERNS IN A GREENHOUSE TUNNEL

1999 ◽  
pp. 51-60 ◽  
Author(s):  
T. Boulard ◽  
S. Wang ◽  
R. Haxaire ◽  
C. Kittas ◽  
G. Papadakis ◽  
...  
Keyword(s):  
Air Flow ◽  
Flow Temperature ◽  
Temperature And Humidity

scholarly journals Effect of Cigarette Packaging Sealing on Cigarette Moisture Content

2018 ◽  
Vol 53 ◽  
pp. 01023
Author(s):  
Jianbo Zhan ◽  
Han Zheng ◽  
Hao Wang ◽  
Jun Jiao ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Moisture Content ◽  
Flow Rate ◽  
Air Flow ◽  
Storage Period ◽  
Air Flow Rate ◽  
Cigarette Tobacco ◽  
Temperature And Humidity ◽  
Improvement Measures ◽  
And Storage ◽  
Humidity Environment

The moisture content of cigarette tobacco directly affects the smoking quality and storage period of cigarettes. The influence of the sealing property of cigarette packets on the moisture of the cigarette was studied, and a solution to improve the sealing property of the small package was provided. At the same time, the standard boundary for judging the packaging tightness of cigarette packets is calculated. Under different temperature and humidity environment, the air flow rate of the same packing box is higher than that of the 30-40mL/min interval. Improvement measures were applied to determine the packing seal value index of soft package cigarettes under certain conditions

scholarly journals Investigation of the processes of adsorbent regeneration by compression heat in an adsorption dryer of compressed air

2020 ◽  
Vol 324 ◽  
pp. 02009
Author(s):  
V. V. Kozlov ◽  
E. S. Piskun ◽  
O. S. Ilicheva
Keyword(s):  
Numerical Modeling ◽  
Air Flow ◽  
Dew Point ◽  
Compressed Air ◽  
Adsorbent Regeneration ◽  
Temperature And Humidity ◽  
Regeneration Cycle ◽  
Three Stages

The results of numerical modeling of the processes of drying and regeneration of the adsorbent by heat of compression are presented on the example of the scheme of adsorption drying with the separation of the air flow on the stage of the cooling of the adsorbent. The dynamics of temperature and humidity parameters within the technological columns at all three stages of the adsorption and regeneration cycle was evaluated. It is shown that the considered scheme of adsorption drying allows to provide rather stable average dew point of the dried compressed air without losses on the adsorbent purging.

Validation and Various Qualifications in HVAC System - A Review from Pharmaceutical Quality Assurance Prospect

2018 ◽  
Vol 9 (3) ◽  
Author(s):  
Amit B Patil ◽  
Varun Kumar K R ◽  
Ajay P Karnalli
Keyword(s):  
Air Flow ◽  
Hvac System ◽  
Integrity Test ◽  
Particle Count ◽  
Operational Qualification ◽  
Performance Qualification ◽  
Temperature And Humidity ◽  
Air Ventilation ◽  
Test Pressure ◽  
And Performance

The safety of personnel and efficacy of the material including raw ingredients, in-process goods and finished products as well as machineries in the pharmaceutical industry is majorly impacted by the air ventilation quality within the industry. HVAC system stands for Heating, Ventilation and Air Conditioning system, which ensures the optimum quality of air environment as directed by regulatory authorities. The performance of HVAC system is ascertained by conducting validation of this system within specified duration. Validation of HVAC system is achieved at three levels such as installation qualification (IQ), operational qualification (OQ), and performance qualification (PQ); Which is subject to provide documented evidence about the accuracy of results produced by it. The validation of HVAC system involves systemized and assembled documents of its functional specifications such as design drawings, plans, and specifications; followed by validation master plan involving testing, adjusting, and balancing (TAB); and finally, the startup reports. The parameters analyzed are air flow velocity, air flow pattern, air changes per hour, filter leak test, particle count, viable monitoring, filter integrity test, pressure difference, recovery test for temperature and humidity, temperature and humidity uniformity, and fresh air determination.

Cryo-TEM of amphiphilic polymer and amphiphile/polymer solutions

1993 ◽  
Vol 51 ◽  
pp. 876-877
Author(s):  
Yeshayahu Talmon
Keyword(s):  
Microstructural Characterization ◽  
Building Blocks ◽  
Quantitative Information ◽  
Physical Models ◽  
Specimen Preparation ◽  
Time Resolved ◽  
Temperature Changes ◽  
Temperature And Humidity ◽  
Microstructured Fluids ◽  
Air Streams

To achieve complete microstructural characterization of self-aggregating systems, one needs direct images in addition to quantitative information from non-imaging, e.g., scattering or Theological measurements, techniques. Cryo-TEM enables us to image fluid microstructures at better than one nanometer resolution, with minimal specimen preparation artifacts. Direct images are used to determine the “building blocks” of the fluid microstructure; these are used to build reliable physical models with which quantitative information from techniques such as small-angle x-ray or neutron scattering can be analyzed.To prepare vitrified specimens of microstructured fluids, we have developed the Controlled Environment Vitrification System (CEVS), that enables us to prepare samples under controlled temperature and humidity conditions, thus minimizing microstructural rearrangement due to volatile evaporation or temperature changes. The CEVS may be used to trigger on-the-grid processes to induce formation of new phases, or to study intermediate, transient structures during change of phase (“time-resolved cryo-TEM”). Recently we have developed a new CEVS, where temperature and humidity are controlled by continuous flow of a mixture of humidified and dry air streams.

Unidirectional Air Flow Isolators A Review

1974 ◽  
Vol 30 (1) ◽  
pp. 32-41 ◽  
Author(s):  
E. J. Butler ◽  
B. J. Egan
Keyword(s):  
Air Flow
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