Catalytic Kolhe

8/19/2019 Catalytic Kolhe

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AIM: -TO MODEL POROUS MEDIA IN FLUENT

PROBLEM STATEMENT:-

Nitrogen flows through inlet with a uniform veloit! of "#m$s% &asses through a erami

monolith su'strate sha&e( hannels an( then e)its through the outlet*

Figure +, -atal!ti onverter

SIMULATION PROCEDURE:-

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O&en the Ans!s wor.'enh*

Drag FLUENT into the &ro/et shemati*

Dou'le li. on setu&*

-hoose 0D an( (ou'le &reision un(er o&tions an( retain the other (efault settings*

Figure +*+, seletion of fluent &ro/et

PROBLEM SETUP:-

Un(er File menu 1 selet Im&ort2Mesh

After rea(ing the mesh1 he. the gri( using Mesh2-he. o&tion*

Figure ", Mesh he.ing

Selet &ressure 'ase(1 Stea(! state solver *Pro'lem setu&2 3eneral2 Solver*

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S&eif! Tur'ulene mo(el*

Pro'lem setu&2 Mo(els2 4isous*

Dou'le li. an( selet .5e&silon6" e7n8 un(er Mo(el an( Reali9a'le un(er .5e&silon

mo(el an( retain the (efault settings for other &arameters*

Figure 0, S&eif!ing visous mo(el

Pro'lem setu&2 Materials*

-li. on air1 to o&en -reate$E(it Materials &anel*

-li. on FLUENT Data'ase:2 Selet nitrogen 6n"8 from the list2 o&!* -li. on -hange or -reate*

Figure ;, Seleting new material from fluent (ata'ase

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Un(er &ro'lem setu&2 -ell 9one2 Dou'le li. on &art5in un(er 9one*

Selet material name,5 Nitrogen

Default values for other settings*

-li. on o.*

Similarl!1 visit to &art5out 9one an( selet the same settings as a'ove*

Figure #, -ell 9one on(itions

Un(er &ro'lem setu&2ell 9one2 (ou'le li. on &art atal!st un(er 9one*

Selet nitrogen as material*

Selet an( li. on &orous 9one*

Un(er (iretion5+ vetor1 s&eif! as,+1


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=OUNDR> -ONDITION,

Un(er &ro'lem setu&2=oun(ar! on(itions*

Selet inlet un(er 9one an( hoose veloit!5inlet from (ro&(own menu un(er t!&e*

Figure ?, =oun(ar! on(ition at inlet as veloit!

Select outlet under zone and choose pressure-outlet from the dropdown

menu under type. Input all parameters n momentum ta! as shown !elow.

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Figure @, =oun(ar! on(ition at outlet as Pressure

SOLUTION:-

Un(er solution metho(s*

Selet ou&le( un(er &ressure5veloit! ou&ling*

Selet 3reen53auss No(e 'ase( un(er gra(ient*

Figure , Solution metho(

Un(er &ro'lem setu&2 solution ontrols*

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Figure B, Solution ontrols (efault values

Solution 2 Monitors*

Dou'le li. on resi(uals*

Ta'le &lot un(er o&tions*

Solution2 Monitors2 Surfae monitors* -reate surfae monitors*

Figure +


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Figure ++, C!'ri( solution initiali9ation

The soluton procedure can !e started n the follown% manner. Soluton (

,un calculaton. nter 1 for num!er of teraton and clc* on calculate.

Figure +", surfae monitor of mass flow rate* Straight line shows solution has onverge(*

Figure +0, Plot of resi(uals i*e* veloit!1 energ!1 et* Different olour line show (ifferent &arameter* Li.e1 re( line show

veloit! in ) (iretion1 3reen line show veloit! in ! (iretion1 et* As iteration value go on inreasing1 the lines are

'eoming straight that show solution will onverge*

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RESULT:

Draw ontours of stati &ressure on walls* Dis&la!2 3ra&his an( animations1 (ou'le

li. on -ontours1 a new win(ow will o&en then selet &ressure un(er ontours of

stati &ressure 1 'elow that selet all walls un(er surfaes*

Figure +;, -ontours of &ressure at (ifferent setion of wall i*e* at wall &art atal!st1 wall &art in an( wall

&art out* On left si(e1 the legen(s show values of &ressure over a range* Legen(s value is in(iate( in form

of olour*

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Figure +#, Re&ort of &ressure at inlet an( outlet* Area weighte( average of stati &ressure at inlet is

;"B*

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Catalytic Kolhe