Transient Multiphase Flow Simulation using Eulerian Granular Multiphase Model in ANSYS Fluent 18

In this tutorial, I simulate the case of sediment transport in a channel using Eulerian Granular Multiphase Model. Some sand is considered at the channel bed of which motion is simulated using ANSYS Fluent 18.

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Weekend Solo Excursion # 1 – You Yangs Regional Park

The idea of running in the You Yangs probably stemmed when I came across a well organized ultramarathon at the same venue but never took a proper shape until last week.

September 10, 2014: I ran my first trail race ever and it was hard. Running and hiking approx. 23k among the trails of Anglesea took me a little more than 2 hours (2:04). I was surprised by the kind of challenges that one can face during a trail race. I have never been much of a hill runner and therefore elevations (the highs and the lows of the course) were the first thing to pop in my mind. But probably the most difficult part was the terrain of which I had no idea would play such a critical role. I was happy to get done with the event and took the train back home. And then it happened.

I was looking out of the window, tired and dusted when I came across this.

It was beautiful. Those peaks in the background looked appealing. I was broken but my spirits were high. To make myself comfortable with the rigor of hill running, I need to run with them. And that’s when I thought that I will come here next weekend, no matter what.

I looked more about the YY on internet. I had a look on the routes that people usually follow and the routes that constituted  the ultramarathon. With all that information and some of the maps, I came up with my own route that would start from the train station (because I use public transport), wander among YY and came back at the station.

Capture

September 16, 2017: As per the plan, I started at around 8 AM. I had a backpack which contained water and some energy bars and gels, in case if I go down on energy. I took in my phone with an offline map of the park installed in it, just in case if I have problems to navigate. And that was it.

Overall, the terrain was challenging. I came across some mountain bikers (as this park is exclusive for them with a lot of biking trails). The most difficult was to get to the top of Flinders peak (the highest point). It included a lot of stairs and a narrow trail. I had to stop a million times to catch my breath and to run back again. However, the view from the top was worth it.

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I rested for a couple of minutes on the top, had my lunch (aka a gel and a bar) before finally getting up on my feet and ran down the peak. From that point onward, I kept running because time was crucial. The frequency of trains back to the city was less and I could not risk to get late. Fortunately, I got within 5 minutes of the train arrival time and made it back home on time.

The final run could be find here:
https://www.strava.com/activities/1185817684/embed/7053807baeaaf461bfe33df531799f2bc2d59803

As it happened, My First Marathon

About the event: The event is called Sri Chinmoy Princess Park Winter Running Festival. If you don’t know about it, Sri Chinmoy was a spiritual guru who promoted the idea of transcendence through sports and athletics. The usual pattern of their races can be called running in circles. In this particular event held in Princess Park, Melbourne, participants were meant to run around a 5k loop. The event was held in multiple categories: 5k 10k, Half-marathon, 30k and the marathon. For the marathon and the half-marathon, there were provision of extra 2.2k and 1.1k at the start apart from running 8 laps and 4 laps respectively.


I will break down my experience in four parts i.e. the first 10k, and the next, and the next, and the final 12.2k. So, if you are particularly interested at the end, just scroll down. Otherwise, I won’t make it too lengthy anyway.


My expectations: I wanted to finish the marathon. I wanted to be called a marathoner. And therefore my expectations were a lot of hurdles, specially mental. Probably some black toe-nails and blisters if I am lucky. But most importantly, to finish, just to finish.


The first breezy 10k: As with my other races where I ran too fast at the start, I did not want that to happen here because it was a long run, a really long one. I held myself within 5 minute per k pace. I thought this pace could be sustainable in a long run and I could run faster towards the end. I made myself comfortable with the race. En route, I looked around the course, enjoyed the beautiful morning, said my thank-you to all the volunteers I could. Perhaps I stopped twice for water at the aid-stations (I had read and heard this a million times that proper hydration would prevent cramps).


The journey to 20: I was still swaying at  my easy pace after the 10k mark. I gulped down some Gatorade on the next station at 12k mark and thereafter, I had to take a pee break during the next kilometer. My gloves were really holding up well as I realised on stopping that the temperatures were not very high. The journey continued after the restroom until the 20k mark. People were recognising me from the club T-shirt I was wearing. Though nobody knew my name but many boosted me up by their going good TXRTXR you can do it etcA good-vibe sensation passed through me as I felt a sense of oneness.


Beyond the half-marathon: It was not my first time running beyond a half-marathon or a 25k marker but this time was very different. The half-marathon marker brought with itself some sense of hurt and self-doubt. This was where the other part of mind which says you should not be running, let’s finish this and train better for the next one came into play. My last two weeks had been significantly dull with lack of training. My body was still in the process of recovery. All these factors just gave my mind more and more excuses to go towards a DNF (did not finish). During the fifth lap, I was very much convinced by it and was thinking to go towards the finish line rather than for the next loop (the two were located side by side). And then came my saviours! People! Yes, people! Runners!

A woman who was running behind me in the earlier stages ran past me when I had resorted to walking and said “We’re almost there”. Of course we were not, I thought. God damn it, there are three more laps. I don’t know what happened within me but the decision whether to go for a finish (or more precisely a DNF) or the next loop went in favour of the next loop. I stopped at the aid-station to load in more Gatorade and water and ran towards her. I told her about me, and she about herself. Her family had come over to support her and then I missed mine. I ran with her for a while and then asked her to continue as I was walking again. I thought that was the last loop I could do.


Running WITH the mind: I was walking for a long way with occasional jogs in between. Honestly, I did not know why I was jogging as my mind had given up. Perhaps I just wanted to rush to the finish line and call it a day. I was already going way beyond my longest run till date (30k) and was venturing into an unknown territory. I was walking again with the firm determination to just complete this lap and train better for the next one (marathon).

And then it happened again! He said “TXR, we are going to make it! Stay strong”. I don’t know who he was, but we high-fived and I was running again. I was not too sure as to why I was running again but I found out I could still run, though not for long at a time. I exchanged smiles with the woman I met earlier and told her that the game is still on. The plan was simple, run if you can, walk for a while. The next (and the final) decision between the finish line and the next loop was not difficult now.

In the final lap, I met this guy who was running in his 221st marathon (MAN THIS IS CRAZY). We talked about himself during the lap. We were both run-walking the final lap with occasionally passing each other. I experienced hamstring cramps while I was running. So when I got them, I walked. And then I ran again. And walked. But I didn’t stop. The finish line was coming closer (yeah not the DNF line anymore). I, once again, crossed the same guy who had previously lifted my spirits up and he said “TXR, we are almost there” and we high-fived and I shouted at the loudest of my voice “Keep going“. For the last kilometer, I stayed with the 221 marathon guy and he finished ahead of me. A last-second cramp got me standing at the finish line but I finished running. It’s hard to explain the moment but I was proud and blown away by the immensity of the mind (also, it’s pessimism). I finished just under 3:56 and here are some photos/details:

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First lap = 2.2k. Subsequent laps = 5k.
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Am I technically a ultra-runner? 😀
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Earned it!

What a wonderful journey it has been! What an immense amount of support I have got from you, readers. I just want to take a little moment here and say a BIG THANK YOU!

THE RACE MAY BE OVER, BUT THE TRAINING NEVER STOPS!


With this, I think I should stop talking and let you continue your training and if you are doing your first marathon or a half or a 10k or a 5k or even an ultra, I would finish this post with this one piece of advice you might have heard a thousand times before:

You are way beyond the limitations of your mind.
Listen to what it says and do what you should.

First 26.2 Miler Countdown: 2 (On your marks! Get. Set.)

The day is finally here! Well, just a day away.

I am excited as to what is gonna happen tomorrow. Some plans and numbers are going through my head but the target is pretty simple, to make it to the finish line.

I do not have any pre-race rituals or routines. I’m just keeping it easy for today, no hardcore training (I probably can’t even because of the runny nose). I went for a little walk just to clear my head where I listened to a Human Race podcast. My clothes are all set to be worn tomorrow. The race starts at 7 so I have to leave home by 5 to make it on time for the train station. Getting up early would be really challenging (because sleeping itself could be a little challenging).

Since it’s gonna be cold (around 10-12 degrees), I would be wearing three layers on the top and two on the bottom (excluding the inner wears). Gloves and head-cap would be an add-on to survive the cold.

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Close-up view
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A little creepy view

I am all set to take on what had started as a thought two months ago. It had been a nice experience documenting my journey. I am grateful for all who took the time out to have a look at my posts every once a while and appreciated my effort. Till then, let me go out for a run and I’ll be back with all the details 🙂

First 26.2 Miler Countdown: 6, 5, 4 & 3 (Getting back up)

The marathon week is finally here! My thoughts?

  1. I am definitely under-trained.
  2. I am nowhere near my peak fitness.
  3. My maximum distance so far is just over 30k. I have a huge ground to cover before calling it a marathon.

At first, it might seem like a self-doubt, but I don’t take it that way. These are simply the facts which are true. Accepting them makes me feel better! I knew it was not gonna be easy and there are always some setbacks waiting for you but it’s you who have to decide whether it is comfortable in staying down with your back pinned against the ground or to get up and give it all that’s left.

Out of these four days, I tested my body twice. Tuesday, I went for a short 3.5k to check if my body was capable of holding well. It was definitely not. I ran slow. I had to push. Signs that recovery is still on the way.

Thursday, I checked myself again. This time 7k. Easy and hard combined. And felt good. Yes I am still under the influence of cold so I need to wipe my nose every now and then but that is definitely not a problem for running.

Friday, I am taking yet another day of rest. Saturday, I will go for a short run to do a final check.

First 26.2 Miler Countdown: 9, 8 & 7 (Not the best time to get sick)

There were plans for the Friday night (a really long run before the event) and the weekend (to get to Mount buller and have some fun in the snow) but things don’t always go as you plan. Thanks to the crappy Thursday, I had to settle on some humble plans.

My bag was packed Friday night in case I would feel better the next morning to go to Mt. buller but I didn’t. I was over 100 degrees in the morning and decided it would be wiser to just stay home. My daily step counter also suffered a huge blow and so did my marathon training. I definitely am going to be a little (may be more than a little) under-trained for this marathon.

It’s Sunday today and the meds seem to work. I am really hoping to get better by tomorrow so that I could give a final boost to this journey before entering the arena 😉

First 26.2 Miler Countdown: 11 & 10 (Nothing much)

This would be the first time I would be combining any two days in one post but I have to. Individually there is nothing much to report except that Wednesday was a lazy day and Thursday was not, but as a result of which I am sick today (Friday night).

Thursday I rode the bike from home to the university only to carry the same bike to the badminton court in evening. But I didn’t know that the bike was the only thing I was supposed to carry, the rains was all over me on the way. I was drenched when I reached court and I had no extra clothes to change. I still played the games and went back home. The next day was not so pleasant. I am stuck in cold, my nose and throat seem to be packed. I need to have a check on my decision making process in this weather.