scholarly journals Using Environmental Physiology to Teach Physiological Regulation

2021 ◽  
Vol 12 (1) ◽  
pp. 6
Author(s):  
Shawn R. Simonson
Keyword(s):  
Fluid Dynamics ◽  
Open Water ◽  
Professional Association ◽  
State University ◽  
Environmental Physiology ◽  
Physiological Regulation ◽  
Gas Laws ◽  
Underwater Environment ◽  
Environmental Extremes ◽  
Marine Flora

Environmental Physiology at Boise State University, Idaho, is a multidisciplinary course that expands students’ understanding of human regulatory physiology through acute and chronic responses to environmental extremes. Students explore the physics (pressure, fluid dynamics, gas laws, sound, and light) of the underwater environment, marine flora and fauna adaptations to this environment, and the human experience within this environment. Included is completion of the Professional Association of Dive Instructors (PADI) Open Water Scuba Certification. The course culminates in an international dive trip where course concepts are further demonstrated and explored, and conservation activities are undertaken.

The Fluid Dynamics of Turbomachinery Program: Objectives, Organization and Results

1982 ◽  
Author(s):  
G. K. Serovy ◽  
T. H. Okiishi
Keyword(s):  
Fluid Dynamics ◽  
Lessons Learned ◽  
State University ◽  
Good Luck ◽  
Iowa State University ◽  
Original Intent ◽  
Educational Effort ◽  
Number Of Factors ◽  
The Many ◽  
High Level

Since 1968, an advanced educational program in the fluid dynamics of turbomachinery has been offered by the ASME Turbomachinery Institute at Iowa State University. Initiated by concerned individuals to help meet the need for high-level, continuing education in this field of specialization, the course appears to be accomplishing its original intent. The success of the program can be attributed to a number of factors including a good faculty, an eager and qualified group of participants, and scholarly surroundings. As might be expected, timely and thoughtful planning, good luck and competent support are also essential. Of the many lessons learned about this kind of educational effort, several seem important enough to report in this paper.

scholarly journals Prediction of Propeller Performance Using Computational Fluid Dynamics Approach

2019 ◽  
Vol 2 (2) ◽  
pp. 185-193
Author(s):  
Nur Amira Adam ◽  
Ahmad Fitriadhy ◽  
W. S. Kong ◽  
Faisal Mahmuddin ◽  
C. J. Quah
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Cfd Simulation ◽  
Computational Simulation ◽  
Open Water ◽  
Water Model ◽  
Thrust Coefficient ◽  
Propeller Performance ◽  
Prediction Approach ◽  
Thrust And Torque

A reliable prediction approach to obtain a sufficient thrust and torque to propel the ship at desired forward speed is obviously required. To achieve this objective, the authors propose to predict the thrust coefficient (KT), torque coefficient (KQ) and efficiency (η) of the propeller in open-water model test condition using Computational Fluid Dynamics (CFD) simulation approach. The computational simulation presented in the various number of rotational speed (RPM) within the range of advance ratio J=0.1 up to 1.05. The higher value of J lead to decrease 10KQ and KT. While the η increased steadily at the lower value of J and decreased at the higher value of J. The results also showed that the propeller with 1048 rpm obtain a better efficiency at J=0.95 with η= 88.25%, 10KQ=0.1654 and KT= 0.0942. The computation result is very useful as preliminary data for propeller performance characteristics.

scholarly journals Propeller Performance Penalty of Biofouling: Computational Fluid Dynamics Prediction

2020 ◽  
Vol 142 (6) ◽  
Author(s):  
Soonseok Song ◽  
Yigit Kemal Demirel ◽  
Mehmet Atlar
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Flow Characteristics ◽  
Open Water ◽  
Roughness Effect ◽  
Thrust Coefficient ◽  
Propulsion Performance ◽  
Negative Effect ◽  
Open Water Performance ◽  
Propeller Performance

Abstract The negative effect of biofouling on ship resistance has been investigated since the early days of naval architecture. However, for more precise prediction of fuel consumption of ships, understanding the effect of biofouling on ship propulsion performance is also important. In this study, computational fluid dynamics (CFD) simulations for the full-scale performance of KP505 propeller in open water, including the presence of marine biofouling, were conducted. To predict the effect of barnacle fouling on the propeller performance, experimentally obtained roughness functions of barnacle fouling were used in the wall-function of the CFD software. The roughness effect of barnacles of varying sizes and coverages on the propeller open water performance was predicted for advance coefficients ranging from 0.2 to 0.8. From the simulations, drastic effects of barnacle fouling on the propeller open water performance were found. The result suggests that the thrust coefficient decreases while the torque coefficient increases with increasing level of surface fouling, which leads to a reduction of the open water efficiency of the propeller. Using the obtained result, the penalty of propeller fouling on the required shaft power was predicted. Finally, further investigations were made into the roughness effect on the flow characteristics around the propeller and the results were in correspondence with the findings on the propeller open water performance.

A study on the effect of the rake angle on the performance of marine propellers

2011 ◽  
Vol 226 (4) ◽  
pp. 940-955 ◽  
Author(s):  
A N Hayati ◽  
S M Hashemi ◽  
M Shams
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Design Process ◽  
Flow Characteristics ◽  
Open Water ◽  
Rake Angle ◽  
Marine Propellers ◽  
Propeller Design ◽  
Open Water Performance ◽  
Dynamics Method

In this study, the open water performance of three propellers with diverse rake angles was investigated by computational fluid dynamics method. The objective of this study was to find out the influence of the rake angle on the performance of conventional screw propellers. For this purpose, first, the obtained results for three B-series propellers were validated against the empirical results and then by modifying the rake angle, different models were investigated by the same method. Flow characteristics were examined for the models and the evolvement of vortices on different planes around the propeller were compared. The results suggest that in case of conventional screw propellers with linear rake distribution, while the effect of the rake angle on the propeller efficiency is not significant, the augmentation of this parameter improves the propeller thrust, especially at high propeller loads, but at the same time, the required torque increases, which is not desirable for the propeller design process.

A Horseshoe Crab Inspired Surf Zone Robot With Righting Capabilities

2014 ◽  
Author(s):  
Gregory Krummel ◽  
Krishnanand N. Kaipa ◽  
Satyandra K. Gupta
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Horseshoe Crab ◽  
Surf Zone ◽  
Mechanical Design ◽  
Material Selection ◽  
Open Water ◽  
Computational Fluid Dynamics Simulations ◽  
Dynamics Simulations ◽  
Amphibious Robot

In this paper, we present the design of RoboCrab, an amphibious robot capable of traversing moderate surf zone environments. By taking inspiration from the morphology, locomotion, and righting behaviors of a horseshoe crab, the robot is designed for traversal and righting on granular terrain, open water, and turbulent surf zones. We present the details of the crab’s morphology that informed the design of our robot. Next, we present the mechanical design, material selection, and manufacturing of the various parts of the robot. We report the results from the computational fluid dynamics simulations used to characterize the robot shell performance. Finally, we present demonstrations of the physical robot walking and righting in a granular environment.

scholarly journals Performance evaluation of underwater image pre-processing algorithms for the improvement of multi-view 3D reconstruction

ACTA IMEKO ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 69
Author(s):  
Alessandro Gallo ◽  
Fabio Bruno ◽  
Loris Barbieri ◽  
Antonio Lagudi ◽  
Maurizio Muzzupappa
Keyword(s):  
Performance Evaluation ◽  
Performance Analysis ◽  
3D Reconstruction ◽  
Archaeological Site ◽  
3D Models ◽  
Underwater Environment ◽  
Underwater Image ◽  
Processing Algorithms ◽  
Marine Flora ◽  
A Performance

<p class="Abstract">3D models of submerged structures and underwater archaeological finds are widely used in various and different applications, such as monitoring, analysis, dissemination, and inspection. Underwater environments are characterised by poor visibility conditions and the presence of marine flora and fauna. Consequently, the adoption of passive optical techniques for the 3D reconstruction of underwater scenarios is a highly challenging task.</p>This article presents a performance analysis conducted on a multi-view technique that is commonly used in air in order to highlight its limits in the underwater environment and then provide guidelines for the accurate modelling of a submerged site in poor visibility conditions. A performance analysis has been performed by comparing different image enhancement algorithms, and the results have been adopted to reconstruct an area of 40 m<sup>2</sup> at a depth of about 5 m at the underwater archaeological site of Baiae (Italy).

Sign in / Sign up

Export Citation Format

Share Document