1. Using Shark Skin Pattern
Department of Mechanical Engineering and Mechatronics Final Project no.1432
Using Shark Skin Pattern
By: Matanel Biton
Moderator: Dr Itzik Sapir

2. Biological coupling
When water from a natural source flows through a particular medium, micro-organisms that cling to different surfaces. .
With time and under certain conditions, this coupling may cause a serious nuisance, to the point of complete blockage of the piping.
This adherence is called biological coupling

3. Biological coupling
When water from a natural source flows through a particular medium, micro-organisms that cling to different surfaces. .
With time and under certain conditions, this coupling may cause a serious nuisance, to the point of complete blockage of the piping.
This adherence is called biological coupling

4. Shark skin pattern
The skin of the shark is built of lumps and sasses at intervals of mm.
This structure has been shown to reduce drag forces on the body and increase impulse forces produced by the body.
The shark does not have a biological bond.

5. Shark skin pattern
The skin of the shark is built of lumps and sasses at intervals of mm.
This structure has been shown to reduce drag forces on the body and increase impulse forces produced by the body.
The shark does not have a biological bond.

7. The aim of the project
Construction of a machine for embedding shark skin texture on the inner wall of a drip pipe in three different intervals, at low cost to a traditional industry.

8. Research History
“Biofilm structure and its influence on clogging in deep emitters distributing reclaimed waste water “(Dazhung Y, Zhihui B, Rowen M, Environmental Sciences 2009)
“Micropatterned surface for the risk of catheter associated urinary tract infection” (Dazhung Y, Zhihui B, Rowen M, Environmental Sciences 2009)
“Towards minimally fouling substrates: surface grafting and topography “(Wilson L, Schumacher J, Finaly J, Perry R, Polymer preprints 2005)

9. Historical uses

10. Drawings that simulate the Shark skin
Methods
Drawings that simulate the Shark skin

11. The experiment
Combining art and science, shark-shaped plates were produced by a Judaica artist

12. Lab testing of shark skin pattern plates
The experiment
Lab testing of shark skin pattern plates

13. The experiment
90 sec
300 ℃

14. MMT test Lasts about 48 hours. Contains three stages.
The resulting output is the percentage of biofouling chances of survival.

15. Samples experiment First experiment 05.05.2019 Second experiment
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Shark skin 0.4 mm
Shark skin 0.3 mm
Shark skin
0.2 mm
No heat treatment, no skin pattern and no glue
Only thermal treatment without pattern
No thermal treatment without mold
Sewage pipe

16. Experimental results No. Description 1
Only thermal treatment without pattern 2 3
No heat treatment, no skin pattern and no glue 4
Sewage pipe 5
Shark skin 0.2 mm 6
Shark skin 0.3 mm 7
Shark skin 0.4 mm

17. Results and conclusions
Easy to integrate into the production process of the pipes.
Technology is simple to implement.
The production process is cheap and economical.

18. thanks Dr Itzik sapir Prof Idit Avrahami Mr Tamir Ilan Matanel biton