Alternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method

Biofouling is known as one of the main problems in the maritime sector because it can increase the surface roughness of the ship’s hull, which will increase the hull’s frictional resistance  and consequently, the ship’s fuel consumption and emissions. It is thus important to re...

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Autores principales: Muhammad Luqman Hakim, Bagus Nugroho, I Ketut Suastika, I Ketut Aria Pria Utama
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Lenguaje:EN
Publicado: Universitas Indonesia 2021
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spelling oai:doaj.org-article:014fb52bf30247debe24a97af0b254142021-12-02T17:41:43ZAlternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method2086-96142087-210010.14716/ijtech.v12i4.4692https://doaj.org/article/014fb52bf30247debe24a97af0b254142021-10-01T00:00:00Zhttps://ijtech.eng.ui.ac.id/article/view/4692https://doaj.org/toc/2086-9614https://doaj.org/toc/2087-2100Biofouling is known as one of the main problems in the maritime sector because it can increase the surface roughness of the ship’s hull, which will increase the hull’s frictional resistance  and consequently, the ship’s fuel consumption and emissions. It is thus important to reduce the impact of biofouling by predicting the value of . Such prediction using existing empirical methods is still a challenge today, however. Granville’s similarity law scaling method can predict accurately because it can be adjusted for all types of roughness using the roughness function  variable as the input, but it requires iterative calculations using a computer, which is difficult for untrained people. Other empirical methods are more practical to use but are less flexible because they use only one  input. The variance of  is very important to represent the biofouling roughness that grew randomly. This paper proposes an alternative formula for predicting the value of  that is more practical and flexible using the modern statistical method, the Design of Experiments (DOE), particularly two-level full factorial design. For each factor, the code translation method using nonlinear regression combined with optimization of constants was utilized. The alternative formula was successfully created and subjected to a validation test. Its error, calculated against the result of the Granville method, had a coefficient of determination R2= 0.9988 and an error rate of ±7%, which can even become ±5% based on 93.9% of 1,000 random calculations.Muhammad Luqman HakimBagus NugrohoI Ketut SuastikaI Ketut Aria Pria UtamaUniversitas Indonesiaarticleadded frictional resistancebiofoulingdesign of experimentsempirical formulaship resistanceTechnologyTTechnology (General)T1-995ENInternational Journal of Technology, Vol 12, Iss 4, Pp 829-842 (2021)
institution DOAJ
collection DOAJ
language EN
topic added frictional resistance
biofouling
design of experiments
empirical formula
ship resistance
Technology
T
Technology (General)
T1-995
spellingShingle added frictional resistance
biofouling
design of experiments
empirical formula
ship resistance
Technology
T
Technology (General)
T1-995
Muhammad Luqman Hakim
Bagus Nugroho
I Ketut Suastika
I Ketut Aria Pria Utama
Alternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method
description Biofouling is known as one of the main problems in the maritime sector because it can increase the surface roughness of the ship’s hull, which will increase the hull’s frictional resistance  and consequently, the ship’s fuel consumption and emissions. It is thus important to reduce the impact of biofouling by predicting the value of . Such prediction using existing empirical methods is still a challenge today, however. Granville’s similarity law scaling method can predict accurately because it can be adjusted for all types of roughness using the roughness function  variable as the input, but it requires iterative calculations using a computer, which is difficult for untrained people. Other empirical methods are more practical to use but are less flexible because they use only one  input. The variance of  is very important to represent the biofouling roughness that grew randomly. This paper proposes an alternative formula for predicting the value of  that is more practical and flexible using the modern statistical method, the Design of Experiments (DOE), particularly two-level full factorial design. For each factor, the code translation method using nonlinear regression combined with optimization of constants was utilized. The alternative formula was successfully created and subjected to a validation test. Its error, calculated against the result of the Granville method, had a coefficient of determination R2= 0.9988 and an error rate of ±7%, which can even become ±5% based on 93.9% of 1,000 random calculations.
format article
author Muhammad Luqman Hakim
Bagus Nugroho
I Ketut Suastika
I Ketut Aria Pria Utama
author_facet Muhammad Luqman Hakim
Bagus Nugroho
I Ketut Suastika
I Ketut Aria Pria Utama
author_sort Muhammad Luqman Hakim
title Alternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method
title_short Alternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method
title_full Alternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method
title_fullStr Alternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method
title_full_unstemmed Alternative Empirical Formula for Predicting the Frictional Drag Penalty due to Fouling on the Ship Hull using the Design of Experiments (DOE) Method
title_sort alternative empirical formula for predicting the frictional drag penalty due to fouling on the ship hull using the design of experiments (doe) method
publisher Universitas Indonesia
publishDate 2021
url https://doaj.org/article/014fb52bf30247debe24a97af0b25414
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