Nonlinear dead water resistance at subcritical speed

2015 ◽  
Vol 27 (8) ◽  
pp. 082103 ◽  
Author(s):  
John Grue
Keyword(s):  
Water Resistance ◽  
Subcritical Speed ◽  
Dead Water

Experiments on Water Resistance

1908 ◽  
Vol 66 (1719supp) ◽  
pp. 373-373
Author(s):  
Karl Wallin
Keyword(s):  
Water Resistance

Structural Analysis of Water Resistance Paper Using New Types of Materials

2007 ◽  
Vol 61 (4) ◽  
pp. 455-459
Author(s):  
Yoko Saito ◽  
Liu Xiang ◽  
Hideki Touda ◽  
Junji Kasai
Keyword(s):  
Structural Analysis ◽  
Water Resistance

KAJIAN TRANSPORTASI SUNGAI MENGGUNAKAN KAPAL SEMIKATAMARAN

2017 ◽  
Vol 11 (2) ◽  
pp. 145-154
Author(s):  
Luhut Tumpal Parulian Sinaga
Keyword(s):  
Dead Water

Suatu usaha rekayasa engineering pemakaian kapal dengan efek gelombang yang tidak merusak lingkungan dan mampu berlayar pada kedalaman perairan terbatas perlu dibuat dan dikembangkan. Bentuk rekayasa lambung yang digunakan adalah  mengurangi tegangan permukaan air dengan cara membuat body ganda (semacam Tunnel ) di bawah permukaan air. Untuk selanjutnya body ganda di bawah permukaan air ini dinamakan dengan Kapal Hull Semi Catamaran (HSC). Rekayasa lambung kapal HSC dilaksanakan dengan pembuatan beberapa buah model kapal dengan variasi bentuk dan ukuran Tunnel. Gelombang timbul akibat pergerakan Kapal HSC diobservasi di kolam uji yang bisa dikontrol kedalaman perairannya. Dari observasi percobaan model kapal  yang dilakukan , Body kapal bentuk HSC lebih unggul bila dibandingkan dengan penggunaan bentuk body kapal konvensional , beberapa keunggulan yang diberikan bentuk kapal HSC diantaranya adalah pola dan tinggi gelombang timbul akibat pergerakan kapal lebih baik, effisiensi propeller akan meningkat (aliran yang masuk  propeller disc lebih baik dan efisien serta sudut kemiringan poros bisa diperkecil), pengaruh wake bisa dikurangi karena air mati  (dead water) di daerah buritan kapal tereduksi. Diharapkan  penggunaan kapal Hull Semi Catamaran sangatlah efektif digunakan sebagai sarana transportasi sungai maupun laut ( Sea River Ship ). Pengembangan, rekayasa dan inovasi bentuk Hull Semi Catamaran   dilaksanakan di Laboratorium Hidrodinamika  (UPT-BPPH, BPP Teknologi).

Water Resistance of Wood-Based Panels Made without Binders

2020 ◽  
pp. 151-158
Author(s):  
V.N. Ermolin ◽  
◽  
M.A. Bayandin ◽  
S.N. Kazitsin ◽  
A.V. Namyatov ◽  
...  
Keyword(s):  
Water Resistance

scholarly journals Tracking Hydroplasticization by DSC: Movement of Water Domains Bound to Poly(Meth)Acrylates during Latex Film Formation

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2500
Author(s):  
Sebastian M. Dron ◽  
Maria Paulis
Keyword(s):  
Itaconic Acid ◽  
Water Resistance ◽  
Film Formation ◽  
Latex Film ◽  
Water Molecules ◽  
Acrylate Copolymer ◽  
Volatile Organic ◽  
Minimum Film Formation Temperature ◽  
Latex Film Formation ◽  
Formation Step

The film formation step of latexes constitutes one of the challenges of these environmentally friendly waterborne polymers, as the high glass transition (TG) polymers needed to produce hard films to be used as coatings will not produce coherent films at low temperature. This issue has been dealt by the use of temporary plasticizers added with the objective to reduce the TG of the polymers during film formation, while being released to the atmosphere afterwards. The main problem of these temporary plasticizers is their volatile organic nature, which is not recommended for the environment. Therefore, different strategies have been proposed to overcome their massive use. One of them is the use of hydroplasticization, as water, abundant in latexes, can effectively act as plasticizer for certain types of polymers. In this work, the effect of three different grafted hydroplasticizers has been checked in a (meth)acrylate copolymer, concluding that itaconic acid showed the best performance as seen by its low minimum film-formation temperature, just slightly modified water resistance and better mechanical properties of the films containing itaconic acid. Furthermore, film formation monitoring has been carried out by Differential Scanning Calorimety (DSC), showing that itaconic acid is able to retain more strongly the water molecules during the water losing process, improving its hydroplasticization capacity.

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