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microa.ga. cultiva.ion in photobiorea.tors: susta.na.le solutions for a.greener future

Green Chemica. Engineering 2024年第4期5卷 418-439页

作者： Sha.kh a.dur Ra.za. Kha.rul Ba.a. K.m.Oa.edul Isla. a.dul Kha.eel Ha.iffa.moha.med Oma. Fa.uque S.m.Za.ir hossain moha.ma. m.hossain Chemica. Engineering Depa.tment King Fahd University of Petroleum and Minerals Center for Refining a.d a.va.ced Chemica.s King Fahd University of Petroleum & Minerals Depa.tment of Chemica. Engineering University of Bahrain

microa.ga. cultiva.ion in photobiorea.tors（PBRs） ha. emerged a. a.promising a.d susta.na.le a.proa.h to a.dress va.ious environmenta. a.d energy cha.lenges, offering a.multitude of benefits a.ross diverse *** developments in microa.ga. cultiva.ion in photobiorea.tors ha.e contributed substa.tially to the development a.d optimiza.ion of susta.na.le bioprocesses. This review presents a.comprehensive a.a.ysis of recent innova.ions a.d brea.throughs in the field of microa.ga. cultiva.ion, with a.specific focus on their a.plica.ion in photobiorea.tors, a.med a. pa.ing the wa. for a.greener future. This study in-depth exa.ines the a.va.ta.es of microa.ga. cultiva.ion in photobiorea.tors, concentra.ing on its effectiveness in wa.tewa.er trea.ment, CO2bioremediation, a.d the production of biofuels a.d high-va.ue products. The review eva.ua.es the effects of light,sola. irra.iation, tempera.ure, nitrogen a.d phosphorus concentra.ions in culture media, CO2concentra.ions, a.d pH on microa.ga. growth performa.ce, including specific growth a.d bioma.s productivity. The study a.so exa.ines open systems like unstirred ponds, ra.ewa. ponds, a.d circula. ponds a.d closed systems like horizonta. tubula., vertica. bubble-column, a.rlift, fla. pa.el, a.d pla.tic-ba. photobiorea.tors, compa.ing their pros a.d cons. To optimize microa.ga. cultiva.ion, key fa.tors in photobiorea.tor design, including photosynthetic efficiencies, light/da.k（L/D） cycles, CO2concentra.ions, ma.s tra.sfer, hydrodyna.ics beha.ior, a.d p H, a.e extensively investiga.ed. In a.dition, the review outlines recent developments in la.ge-sca.e photobiorea.tors a.d highlights the cha.lenges a.d opportunities a.sociated with photobiorea.tor sca.e-up a.d design pa.a.eter optimiza.ion, including genetic engineering a.d economic fea.ibility. This a.ticle is a.vita. resource for resea.chers, engineers, a.d industry professiona.s seeking susta.na.le bioprocesses a.d the a.plica.ion of microa.ga.-ba.ed technol

关键词： microa.ga. bioma.s CO 2 biofixa.ion Wa.tewa.er trea.ment Biofuel Photobiorea.tors

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Enha.cement of coercivity,permea.ility,a.d dielectric properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites for memory a.d high frequency devices

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Journa. of Ra.e Ea.ths 2024年第6期42卷 1128-1135,I0005页

作者： I.sarda. m.D.hossain m.S.Sikder m.N.I.Kha. m.R.Ra.ma. Physics Discipline Khulna UniversityKhulna9208Bangladesh Depa.tment of Physics Khulna University of Engineering&TechnologyKhulna9203Bangladesh Depa.tment ofComputer Science a.d Engineering Northern University of Business&Technology KhulnaKhulna9100Bangladesh ma.erial Science Division Atomic Energy CentreDhaka1000Bangladesh

Spinel cubic ferrites ha.e huge a.plica.ions in me mory a.d high frequency *** the improvement of these modern devices,the ma.netic coercivity,permea.ility,a.d dielectric properties of a.ferrite a.e the importa.t *** a.ticle focuses on improving the ma.netic coercivity,ma.netic permea.ility,a.d dielectric properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ferrites,where x=0.00,0.06,a.d *** X-ra. diffra.tion(XRD),Fourier tra.sform infra.ed spectroscopy(FTIR),field emission sca.ning electron microscopy(FESEm),energy dispersive X-ra.(EDX),vibra.ing sample ma.netometer(VSm),a.d a. impeda.ce a.a.yzer were used to cha.a.terize the structura.,ma.netic,a.d dielectric properties of the *** XRD pa.terns indica.e the forma.ion of spinel cubic structure of the samples with a.seconda.y pea.(EuFeO_(3))for Eu doped *** densities a.d porosities of the samples follow a. inverse trend,where the doped samples’la.tice pa.a.eters a.e increa.ed with the increment of ra.e ea.th Eu *** FTIR a.a.ysis a.so proves the spinel cubic pha.e of the *** a.era.e gra.n size of the ferrites is obta.ned via FESEm ima.es,a.d it is increa.ed from 121 to 198 *** a.a.ysis confirms tha. doping of the Eu content a.so cha.ges other hysteresis loop properties of Co_(0.2)Zn_(0.3)Ni_(0.5)Eu_(x)Fe_(2-x)O_(4) ***,the coercivity of the Eu doped samples is grea.er tha. tha. of the mother a.loy(x=0.00).The EDX study shows tha. there is no impurity conta.ina.ion in the *** permea.ility a.d dielectric mea.urements show a. improved qua.ity fa.tor of the Eu-doped samples with low ma.netic a.d dielectric *** dependent resistivity a.d impeda.ce a.a.ysis a.so show the improved *** the observed properties of the samples,a.l the investiga.ed ferrites might be strong ca.dida.es for potential a.plica.ions in memory devices,ma.netic sensors,a.d high frequency a.plica.ions.

关键词： Ferrites Ra.ee a.ths Coercivity Permea.ility EDX Resistivity

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ma.hine lea.ning-ba.ed multi-objective optimiza.ion a.d therma. a.sessment of supercritica. CO_(2) Ra.kine cycles for ga. turbine wa.te hea. recovery

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Energy a.d a. 2024年第2期16卷 363-384页

作者： a.if Iqba. Turja.Ishtiak a.med Kha. sabbir Ra.ma. a.hra. musta.im moha.ma. Ishra. hossain m monjurul Ehsan Ya.in Kha. Depa.tment of mecha.ica. a.d Production Engineering(mPE) Islamic University of Technology(IUT)Board BazarGazipur1704Bangladesh

Technologies for utilizing wa.te hea. for power genera.ion ha.e a.tra.ted significa.t a.tention in recent yea.s due to their potential to enha.ce energy efficiency a.d reduce greenhouse ga. *** resea.ch focuses on the compa.a.ive a.d optimiza.ion a.a.ysis of three supercritica. ca.bon dioxide(sCO_(2))Ra.kine cycles(simple,ca.ca.e,a.d split)for ga. turbine wa.te hea. *** study begins with pa.a.etric a.a.ysis,investiga.ing the significa.t effects of key va.iables,including turbine inlet tempera.ure,condenser inlet tempera.ure,a.d pinch point tempera.ure,on the therma. performa.ce of a.va.ced sCO_(2) power *** identify the most efficient cycle configura.ion,a.multi-objective optimiza.ion a.proa.h is *** a.proa.h combines a.Genetic a.gorithm with ma.hine lea.ning regression models(Ra.dom Forest,XGBoost,a.tificial Neura. Network,Ridge Regression,a.d K-Nea.est Neighbors)to predict cycle performa.ce using a.da.a.et extra.ted from cycle *** decision-ma.ing process for determining the optima. cycle configura.ion is fa.ilita.ed by the TOPSIS(technique for order of preference by simila.ity to the idea. solution)*** study's ma.or findings revea. tha. the split cycle outperforms the simple a.d ca.ca.e configura.ions in terms of power genera.ion a.ross va.ious opera.ing *** optimized split cycle not only demonstra.es superior power output but a.so exhibits enha.ced net power output,hea. recovery,system a.d exergy efficiency of 7.99 mW,76.17%,26.86%a.d 57.96%,respectively,ma.ing it a.promising choice for wa.te hea. recovery *** resea.ch ha. the potential to contribute to the a.va.cement a.d widesprea. a.option of wa.te hea. recovery in energy technologies boosting system efficiency a.d economic *** provides a.new perspective for future resea.ch,contributing to the improvement of energy genera.ion infra.tructure.

关键词： Supercritica. co2 Ra.kine cycle Wa.te hea. recovery Ga. turbine Thermodyna.ic a.a.ysis ma.hine Lea.ning Optimiza.ion

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Exploring the electroma.netic shielding beha.ior of la.tha.um doped ca.cium na.oferrites

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Journa. of Ra.e Ea.ths 2024年第11期42卷 2128-2136页

作者： E.a.ila.deswa.i K.sakthipa.di R.Ra.esh Ka.na.G.Ra.kuma. B.Ga.esh Ba.u S.a.unmetha.a.la. hossain P.sakthivel V.Ra.endra. m.Srinidhi Ra.ha.a. Depa.tment of Physics SRM TRP Engineering College Depa.tment of Electronics a.d Communica.ion Engineering M. Kumarasamy College of Engineering Depa.tment of Physics Easwari Engineering College Depa.tment of mecha.ica. Engineering SRM TRP Engineering College Centre for a.va.ced Energy Studies Department of Electronics and Communication EngineeringKoneru Lakshmaiah Education Foundation Sma.t ma.erials Resea.ch Institute Southern Federal University Centre for ma.erials Science Department of PhysicsScience and HumanitiesFaculty of EngineeringKarpagam Academy of Higher Education Centre for Na.otechnology Academy of Maritime Education and Training (Deemed to be University) Depa.tment of Chemistry a.d Centre for Na.o-ma.erials a.d Displa.s B.M.S. College of Engineering

The present study focuses on the synthesis a.d cha.a.teriza.ion of la.tha.um(La.+)-doped ca.cium na.oferrites(Ca.a.Fe2-xO4:x=0.025,0.050,0.075 a.d 0.100) using the sonochemica. *** techniques were employed to a.a.yze the effect of La.+infusion,Ra.a. spectroscopy confirms the presence of a.tive a.g,T2ga.d Egmodes in the Ca.a.Fe2-xO4na.oferrite,indica.ing the forma.ion of a. a.tive ferrite *** introduction of La.+doping results in a.significa.t increa.e in the ba.d ga. energy,rendering the na.oferrites insula.ing（3.23-3,57 eV）.a. higher frequencies,the impeda.ce studies revea. minima. losses a.d better a. conductivity,pointing to improved dielectric *** higher frequencies,the Q-fa.tor of La.doped ca.cium na.oferrites shows lower electroma.netic *** m-H curve exhibits ferroma.netic beha.ior,with La.+-doped ca.cium na.o ferrites displa.ing a.satura.ion ma.netiza.ion ra.ging from 12.72 to 18.10 emu/*** incorpora.ion of La.+a.so induces enha.ced electrica. pola.iza.ion,lea.ing to nota.le dielectric loss a.d increa.ed a.sorption of electroma.netic ***,these Ca.a.Fe2-xO4na.oferrites demonstra.e potential a. effective microwa.e a.sorbers a.ross a.wide frequency ra.ge,with significa.t shielding a.sorption observed a. 8.8-9.1 GHz.

关键词： Dielectric ma.netism microwa.e a.sorption Na.oferrites Ra.e ea.ths Structura. properties

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Predicting the Stitch Density of Finished Fa.rics Using Weft Blended Grey Knit Fa.rics

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Journa. of Textile Science a.d Technology 2024年第3期10卷 51-63页

作者： Ka.i md. Elias moha.ma. Oba.dur Ra.ma. H. m. Za.ir hossain Depa.tment of Physics Jahangirnagar University Savar Bangladesh Jute Textile Wing Bangladesh Jute Research Institute Dhaka Bangladesh

Stitch density is one of the critica. qua.ity pa.a.eters of knit fa.rics. This pa.a.eter is closely rela.ed to other physica. qua.ity pa.a.eters like fa.ric weight, fa.ric tightness fa.tor, fiber types, blend ra.io, ya.n diameter a.d linea. density, a.d fa.ric structure. Selecting stitch density (wa.es per inch, course per inch) is essential to getting the a.propriate fa.ric weight a.d desired qua.ity. Usua.ly, no rules or a.sumptions exist to get the desired stitch density in the finished fa.ric sta.e. Fifteen types of blended knit fa.rics were prepa.ed to conduct the study. The va.ying percenta.es of cotton, polyester, a.d ela.ta.e a.e incorpora.ed in the blends. Regression a.a.ysis a.d regression a.OVa.tests were done to predict the stitch density of finished fa.rics. a.suita.le regression equa.ion is esta.lished to get the desired results. The study a.so found tha. the stitch density va.ue in the finished sta.e fa.ric decrea.es by a.proxima.ely 15% compa.ed to the stitch density in the grey fa.ric sta.e. This study will help the fa.ric ma.ufa.turers get the finished fa.ric stitch density in a.va.ce by utilizing the grey fa.ric stitch density da.a.set. The a.thor expects this resea.ch to benefit the knitting a.d dyeing industry, new resea.chers, a.d a.va.ced resea.chers.

关键词： Wa.es per Inch Course per Inch Stitch Density Blended Knit Fa.ric

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Effect of Ha.l current on mHD na.ura. convection flow from vertica. permea.le fla. pla.e with uniform surfa.e hea. flux

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a.plied ma.hema.ics a.d mecha.ics(English Edition) 2011年第9期32卷 1127-1146页

作者： L.K.saHa.S.siddiqa m.a.hossain Depa.tment of ma.hema.ics University of DhakaDhaka 1000Bangladesh Depa.tment of ma.hema.ics COMSATS Institute of Information TechnologyPark RoadChak ShahzadIslamabad 44000Pakistan

The effect of the Ha.l current on the ma.netohydrodyna.ic （mHD） na.ura. convection flow from a.vertica. permea.le fla. pla.e with a.uniform hea. flux is a.a.yzed in the presence of a.tra.sverse ma.netic *** is a.sumed tha. the induced ma.netic field is negligible compa.ed with the imposed ma.netic *** bounda.y la.er equa.ions a.e reduced to a.suita.le form by employing the free va.iable formula.ion （FVF） a.d the strea. function formula.ion （SFF）.The pa.a.olic equa.ions obta.ned from FVF a.e numerica.ly integra.ed with the help of a.stra.ghtforwa.d finite difference ***,the nonsimila. system of equa.ions obta.ned from SFF is solved by using a.loca. nonsimila.ity method,for the whole ra.ge of the loca. tra.spira.ion pa.a.eter ζ.Considera.ion is a.so given to the regions where the loca. tra.spira.ion pa.a.eter ζ is sma.l or la.ge ***,in these pa.ticula. regions,solutions a.e a.quired with the a.d of a.regula. perturba.ion *** effects of the ma.netic field m a.d the Ha.l pa.a.eter m on the loca. skin friction coefficient a.d the loca. Nusselt number coefficient a.e gra.hica.ly shown for sma.ler va.ues of the Pra.dtl number P r （= 0.005,0.01,0.05）.Furthermore,the velocity a.d tempera.ure profiles a.e a.so dra.n from va.ious va.ues of the loca. tra.spira.ion pa.a.eter ζ.

关键词： ma.netohydrodyna.ic (mHD) na.ura. convection Ha.l current permea.le pla.e hea. flux

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Beyond Stitches: a.a.ysis of Disea.e Burden in a.Ba.gla.eshi RmG Fa.tory

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Hea.th 2024年第7期16卷 688-702页

作者： ma.iam Za.a. Ta.eb a.mmed Na.ila.Binte hossain S. m. Ra.sul Ha.ue a.iful Isla. Joa.der Ka.ra. ul Ba.et Depa.tment of Procurement SM Group Dhaka Bangladesh Depa.tment of Neurosurgery Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh Depa.tment of Public Hea.th Independent University Bangladesh (IUB) Dhaka Bangladesh Depa.tment of Ca.diology Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh

Introduction: Ba.gla.esh ha. experienced rema.ka.le growth in RmG over the pa.t 25 yea.s. With the knitwea. industry providing more tha. 4 million direct jobs, providing better occupa.iona. hea.th a.d safety of workers rema.ns a.cha.lenge. a.m of the study: The a.m of the study wa. to a.a.yze the disea.e burden of a.RmG fa.tory, a.d to highlight occupa.iona. hea.th risks. methods: a.cross-sectiona. study design wa. employed for this a.a.ysis. a.17-month da.a.entry (Ja.ua.y 2020 - ma. 2021) wa. ga.hered from the fa.tory in-house clinic. The socio-demogra.hic a.d clinica. diagnosis entries of 8421 entries were a.a.yzed. Result: The popula.ion of the fa.tory workers is 5370, where 40% (2148) a.e fema.e workers a.d 60% (3222) a.e ma.e workers. The mea. a.e of respondents is 30 yea.s, with a.SD of ±7 yea.s. a.ong the chief compla.nts, the most common wa. vomiting (14%;2262) fever (14%;2247), runny nose (11%;1842), cough (9%;1465), a.d loose motion (8%;1364). In the diagnosis ca.egories, ga.trointestina. disea.es were more predomina.tly diagnosed (35%;2978), followed by vira. fever (21%;1772), neurologica. disea.es (16.5%;1389) a.d musculoskeleta. disorders (9%;768). The a.era.e cost of medicine for ea.h respondent is BDT 36. The fa.tory covered costs of a.l medica.ion for 99% (8380) of respondents. Only 0.5% (37) wa. referred to a.tertiary hospita. for further eva.ua.ion. Conclusion: Ga.ments workers suffer mostly from long-term occupa.iona. hea.th ha.a.ds. Fa.tory owners a.d policy ma.ers ca. contribute in va.ious wa.s to improving prima.y hea.thca.e options for workers.

关键词： RmG Disea.e Burden Work Rela.ed Disea.e Communica.le Disea.e Occupa.iona. safety

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Viscosity Effects on a.isotropic Universe in Curva.ure-ma.ter Coupling Gra.ity

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Communica.ions in Theoretica. Physics 2018年第5期69卷 537-543页

作者： m.Sha.if a.sha.siddiqa Depa.tment of ma.hema.ics University of the PunjabQuaid-e-Azam Campus

In this pa.er, we study evolution of the universe in the ba.kground of f(R, T) gra.ity using LRS Bianchi type-Ⅰ model. We discuss sca.e fa.tors a. well a. decelera.ion pa.a.eter in da.k energy domina.ed era.for different bulk viscosity models. The occurrence of big-rip singula.ity is a.so exa.ined. It is concluded tha. expa.sion is fa.ter when bulk viscosity is proportiona. to Hubble pa.a.eter a. compa.ed to other models.

关键词： f(R T) gra.ity a.isotropic universe bulk viscosity

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Impa.t of a.tion Observa.ion Thera.y a.ong with Usua. Physiothera.y Intervention of Individua. with a.zheimer’s Disea.e

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a.va.ces in a.zheimer's Disea.e 2024年第1期13卷 1-10页

作者： Za.id Bin Sulta. Na.id Fa.uq a.med Tuhin a.a.med md Kutub Uddin md Sira.ul Isla. S m ma.uf hossain sajib md Ra.iqul Isla. Depa.tment of Physiothera.y Saic College of Medical Science and Technology Mirpur Bangladesh Depa.tment of Physiothera.y Centre for the Rehabilitation of the Paralysed (CRP) Savar Bangladesh Depa.tment of Physiothera.y Centre for the Rehabilitation of the Paralysed (CRP) Mymensingh Bangladesh Depa.tment of Physiothera.y Centre for the Rehabilitation of the Paralysed (CRP) Mirpur Bangladesh Depa.tment of Physiothera.y State College of Health Sciences Dhaka Bangladesh

a.zheimer’s disea.e (a.) is a.neurodegenera.ive disorder cha.a.terized by cognitive impa.rments in the initial sta.e, which lea. to severe cognitive dysfunction in the la.er sta.e. a.tion observa.ion thera.y (a.T) is a.multisensory cognitive reha.ilita.ion technique where the pa.ient initially observes the a.tions a.d then tries to perform. The study a.med to exa.ine the impa.t of a.T a.ong with usua. physiothera.y interventions to reduce depression, improve cognition a.d ba.a.ce of a.pa.ient with a.. a.67 yea.s old pa.ient with a. wa. selected for this study beca.se the pa.ient ha. been suffering from depression, dementia, a.d physica. dysfunction a.ong with some other hea.th conditions like diabetes a.d hypertension. Before sta.ting intervention, a.ba.eline a.sessment wa. done through the Beck Depression Inventory (BDI) tool, the mini-Cog Sca.e, a.d the Berg Ba.a.ce Sca.e (BBS). The pa.ient received 12 sessions of a.T a.ong with usua. physiothera.y interventions thrice a.week for four weeks, which included 45 minutes of ea.h session. a.ter four weeks of intervention, the pa.ient demonstra.ed significa.t improvement in depression, cognition, a.d ba.a.ce, wherea. the BDI score declined from modera.e 21/63 to mild 15/63 level of depression. The mini-Cog score improved from 2/5 to 4/5, a.d the BBS score increa.ed from 18/56 to 37/56. It is concluded tha. a.T a.ong with usua. physiothera.y intervention helps to reduce depression, improve cognition a.d ba.a.ce of people with a..

关键词： a.zheimer’s Disea.e a.tion Observa.ion Thera.y Physiothera.y Intervention

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mixed Convection Bounda.y La.er Flow over a.Vertica. Fla. Pla.e with Ra.iative Hea. Tra.sfer

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a.plied ma.hema.ics 2012年第7期3卷 705-716页

作者： sa.ia.siddiqa.m. a. hossain Depa.tment of ma.hema.ics COMSATS Institute of Information Technology Park Road Chak Shahzad Islamabad Pakistan Former Professor of ma.hema.ics University of Dhaka Dhaka Bangladesh

In this a.ticle, the problem of mixed convection bounda.y la.er flow of viscous fluid a.ong a.hea.ed vertica. pla.e is exa.ined. In the a.a.ysis ra.iative component of hea. flux emula.es the surfa.e tempera.ure. a.propriate set of va.iables a.e embra.ed here which reduces the governing bounda.y la.er equa.ions into dimensionless form. Subsequently, a.group of continuous tra.sforma.ion is a.plied on the dimensionless equa.ions in order to obta.n the pa.a.olic pa.tial differential equa.ions for the regimes where modified Richa.dson number, Ri*, is 1) sma.l i.e. when Ri* 1, 2) la.ge i.e. when Ri* 1, a.d 3) covers a.l its va.ues i.e. when 0 ≤ Ri* ≤ ∞. The system of equa.ion for the corresponding regimes a.e thus integra.ed numerica.ly via stra.ghtforwa.d finite difference method a.ong with Ga.ssian elimina.ion technique. Its worth mentioning tha. results obta.ned here a.e va.id pa.ticula.ly for the liquid meta.s for which Pr 1. moreover, the numerica. results a.e demonstra.ed gra.hica.ly by showing the effects of importa.t physica. pa.a.eters, na.ely, the modified Richa.dson number (or mixed convection pa.a.eter), Ri*, surfa.e ra.iation pa.a.eter, R, a.d Pra.dtl number, Pr, in terms of loca. skin friction a.d loca. Nusselt number coefficients. In a.dition, comprehensive interpreta.ion of therma. energy distributions is a.so given in terms of hea.lines which is termed a. good tool to visua.ize the flow pa.terns.

关键词： mixed Convection Therma. Ra.iation Liquid meta.s

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