# Computational Investigation of Pitch Motion of a High-Speed Craft Incorporated with Trim-Tabs
> Fitriadhy A.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_85133483751
Jurnal / Konferensi: Cfd Letters
Tahun terbit: 2022
DOI: https://doi.org/10.37934/cfdl.14.6.5671
ISSN: 21801363
Citations: 7

## Authors
- Fitriadhy A.

## Abstract
An excessive trim by stern on a high-speed craft is vulnerable to decrease comfortable ride incorporated with the large pitch motion. To prevent such problem, the craft is then equipped with a device known as “trim-tabs” providing a lift force at the stern region, which leads to reduce pitch angle/trim of the craft. This paper presents computational modelling of trim-tabs on high-speed craft towards reducing the pitch motion in the calm water condition. Here, the commercial Computational Fluid Dynamic (CFD) software; called Numeca Fine Marine has been accordingly utilised to evaluate several effects of Froude numbers (Fr) and angle of the trim-tabs into characteristics of the lift force of the high-speed craft. The results revealed that the pitch motion of the high-speed craft equipped with the trim-tabs (5o) has significantly reduced up to 76% at Fr = 1.0. This can be explained that the installed trim-tabs has increased the negative trim moment, which inherently creates the restoring moment pushing the stern up along the pitch-axis. Meanwhile, this may cause involuntary the total ship’s resistance increased. In general, this simulation pointed out the advantage of the trim-tabs to increase the comfortability of the high-speed craft.

## Keywords
- Trim
- Stern
- Craft
- Lift (data mining)
- Engineering
- Structural engineering
- Simulation
- Marine engineering
- Computer science
- Data mining
- Archaeology
- History

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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