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Bio-inspired propulsion of micro-swimmers within a passive cervix filled with couple stress mucus.
Comput Methods Programs Biomed. 2020 Jan 11; 189:105313.CM

Abstract

BACKGROUND AND OBJECTIVE

The swimming mechanism of self-propelling organisms has been imitated by biomedical engineers to design the mechanical micro bots. The interaction of these swimmers with surrounding environment is another important aspect. The present swimming problem integrates Taylor sheet model with couple stress fluid model. The thin passage containing micro-swimmers and mucus is approximated as a rigid (passive) two-dimensional channel. The spermatozoa forms a pack quite similar as a complex wavy sheet.

METHODS

Swimming problem with couple stress cervical liquid (at low Reynolds number) leads to a linear sixth order differential equation. The boundary value problem (BVP) is solved analytically with two unknowns i.e. speed of complex wavy sheet and flow rate of couple stress mucus. After utilizing this solution into equilibrium conditions these unknowns can be computed via Newton-Raphson algorithm. Furthermore, the pairs of numerically calculated organism speed and flow rate are utilized in the expression of power dissipation.

RESULTS

This work describes that the speed of micro-swimmers can be enhanced by suitable rheology of the surrounding liquid. The usage of couple stress fluid as compared to Newtonian fluid enhances the energy dissipation and reduces the flow rate. On the other hand complex wavy surface also aids the organisms to swim faster.

Authors+Show Affiliations

NUTECH School of Applied Sciences and Humanities, National University of Technology, Islamabad, 44000, Pakistan. Electronic address: zeeshanasghar@nutech.edu.pk.Department of Mathematics and Statistics, International Islamic University, Islamabad 44000, Pakistan.Department of Mathematics, Northern University, Nowshera, KPK, 24100, Paksitan.NUTECH School of Applied Sciences and Humanities, National University of Technology, Islamabad, 44000, Pakistan.Department of Mechanical Engineering, Aliabad Katoul Branch, Islamic Azad University, Aliabad Katoul, Iran.School of Mathematics and Statistics Beijing Institute of Technology, Beijing, 100081, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31982669

Citation

Asghar, Zeeshan, et al. "Bio-inspired Propulsion of Micro-swimmers Within a Passive Cervix Filled With Couple Stress Mucus." Computer Methods and Programs in Biomedicine, vol. 189, 2020, p. 105313.
Asghar Z, Ali N, Javid K, et al. Bio-inspired propulsion of micro-swimmers within a passive cervix filled with couple stress mucus. Comput Methods Programs Biomed. 2020;189:105313.
Asghar, Z., Ali, N., Javid, K., Waqas, M., Dogonchi, A. S., & Khan, W. A. (2020). Bio-inspired propulsion of micro-swimmers within a passive cervix filled with couple stress mucus. Computer Methods and Programs in Biomedicine, 189, 105313. https://doi.org/10.1016/j.cmpb.2020.105313
Asghar Z, et al. Bio-inspired Propulsion of Micro-swimmers Within a Passive Cervix Filled With Couple Stress Mucus. Comput Methods Programs Biomed. 2020 Jan 11;189:105313. PubMed PMID: 31982669.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bio-inspired propulsion of micro-swimmers within a passive cervix filled with couple stress mucus. AU - Asghar,Zeeshan, AU - Ali,Nasir, AU - Javid,Khurram, AU - Waqas,Muhammad, AU - Dogonchi,Abdul Sattar, AU - Khan,Waqar Azeem, Y1 - 2020/01/11/ PY - 2019/09/06/received PY - 2020/01/01/revised PY - 2020/01/03/accepted PY - 2020/1/27/pubmed PY - 2020/1/27/medline PY - 2020/1/27/entrez KW - Complex wavy sheet KW - Couple stress fluid KW - Low Reynolds number KW - Newton-Raphson algorithm SP - 105313 EP - 105313 JF - Computer methods and programs in biomedicine JO - Comput Methods Programs Biomed VL - 189 N2 - BACKGROUND AND OBJECTIVE: The swimming mechanism of self-propelling organisms has been imitated by biomedical engineers to design the mechanical micro bots. The interaction of these swimmers with surrounding environment is another important aspect. The present swimming problem integrates Taylor sheet model with couple stress fluid model. The thin passage containing micro-swimmers and mucus is approximated as a rigid (passive) two-dimensional channel. The spermatozoa forms a pack quite similar as a complex wavy sheet. METHODS: Swimming problem with couple stress cervical liquid (at low Reynolds number) leads to a linear sixth order differential equation. The boundary value problem (BVP) is solved analytically with two unknowns i.e. speed of complex wavy sheet and flow rate of couple stress mucus. After utilizing this solution into equilibrium conditions these unknowns can be computed via Newton-Raphson algorithm. Furthermore, the pairs of numerically calculated organism speed and flow rate are utilized in the expression of power dissipation. RESULTS: This work describes that the speed of micro-swimmers can be enhanced by suitable rheology of the surrounding liquid. The usage of couple stress fluid as compared to Newtonian fluid enhances the energy dissipation and reduces the flow rate. On the other hand complex wavy surface also aids the organisms to swim faster. SN - 1872-7565 UR - https://www.unboundmedicine.com/medline/citation/31982669/Bio-inspired_propulsion_of_micro-swimmers_within_a_passive_cervix_filled_with_couple_stress_mucus L2 - https://linkinghub.elsevier.com/retrieve/pii/S0169-2607(19)31516-0 DB - PRIME DP - Unbound Medicine ER -
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