I think the question was for ghusul and not wudu...
A brief summary of the requirements for the Ghusl follow.
1) The Muslim should make their intentions for purification, then wash the private parts.
2) Make wudu like the wudu done for prayer, then pour water on his right side, then the left side.
3) Water should be poured on his head, covering the entire body with water.
It is also reported in the sunnah that the washing the feet should be delayed until the end of the ghusl.
As is reported on the authority of A'ishah (May Allah be pleased with her) who said that the Messenger of Allah (peace and blessings of Allah be upon him) when performing ghusl from janaba used to wash his hands, then wash his private parts with his left hand. After that he performed wudu like that for prayer. Next he took some water and ran his fingers in the roots of his hair until he used three handfuls of water on his head. He would then go on pouring water on the rest of his body and wash his legs. (It was reported by Muslim #479.) In the narration of Al-Bukhari it states that he (peace and blessings of Allah be upon him) then turned aside and washed his legs.
The causes that make ghusl a must are:
The emission of semen, because the Prophet (peace and blessings of Allaah be upon him) said: "What requires water (ghusl) is if you see water (i.e., semen) coming out of you." (Reported by Muslim, no. 1/269)
Contact between the genitals, because the Prophet (peace and blessings of Allaah be upon him) said: "If one part enters the other part (in another report: if one part touches the other part), then ghusl becomes obligatory." (Reported by Ahmad and Muslim, no. 526) This ghusl is obligatory whether or not fluid (semen) is released. "touching" here refers to the entry of the tip of the penis into the vagina, not mere touching.
Menstruation and nifaas (post-natal bleeding), because Allaah says (interpretation of the meaning): ". . . And when they have purified themselves, then go in unto them as Allaah has ordained for you. . ." [al-Baqarah 2:222]; and because the Prophet (peace and blessings of Allaah be upon him) said to Faatimah bint Hubaysh, may Allaah be pleased with her: "When your period starts, stop praying, and when your period ends, perform ghusl then start praying again." (Reported by al-Bukhari, Fath, 309)
Death: the dead - apart from a martyr slain in battle - must be washed (ghusl), because when his daughter Zaynab died, the Prophet (peace and blessings of Allaah be upon him) said: "Wash her with water three or five times, or as many times as you see fit" (Reported by al-Bukhaari, al-Fath, 1175); and when a man who was in a state of ihraam was killed by his riding-beast, he said: "Wash him with water and lotus leaves and wrap him in his two garments, but do not embalm him or cover his head, for he will be raised on the Day of Resurrection pronouncing the Talbiyah." (Reported by al-Bukhaari, Fath, 1186)
There are other types of ghusl about which the scholars differed as to whether they are obligatory, such as performing ghusl on Fridays, or whether a person who becomes Muslim needs to perform ghusl upon entering the Faith.
There are types of ghusl which are encouraged, such as: ghusl on the two Eids; ghusl after washing a dead body; ghusl before entering the state of ihraam or entering Makkah; ghusl for a woman who is suffering from istihaadah (abnormal non-menstrual bleeding) before every prayer; ghusl after being unconscious; and ghusl after burying a mushrik. (Tamaam al-Minnah by al-Albaani, p. 120)
And Allaah knows best
Here is an lesson on Ghusul.
GHUSL OR OBLIGATORY BATH
The Arabic term for bath is ghusl. This bath when taken is done with a specific niyyah or intention. It must be noted that the main principle is that the water must flow all over the body.
There are two kinds of ghusl and they are :
. The Wajib Ghusl or Obligatory Bath.
The Sunnah Ghusl or Commendable Bath.
The Wajib Ghusl or Obligatory Bath
This ghusl is taken when any one of the following occurs :
After sexual intercourse.
Emission or secretion of mani (semen).
Death ( except for those who have died as martyrs in the cause of Allah).
The Sunnah Ghusl or Commendable Bath
This ghusl is taken :
For the performance of Jumaat (Friday) prayers.
For the performance of the two 'Id prayers.
For the Istisqaak, Khusuuf and Kusuuf prayers.
Before entering either Mecca or Madinah.
Before putting on the ihraam for the performance of Haj.
For the performance of the wuquuf at 'Arafah during Haj.
For the performance of the night-stay at Muzdalifah during Haj.
For the performance of tawaf and the sa'ie during Haj & Umrah.
Upon conversion to Islam.
After bathing a corpse.
Upon gaining consciousness from a faint or insanity.
Before the performance of the jamrah stone-throwing rite during Haj.
The hukum (law) for the ghusl we take daily is mubah (permissible). We would be rewarded if we make a conscious effort to intend in our hearts (niyyah) that we are taking the bath to keep ourselves clean since Allah loves those who are always in a clean and pure state.
The Fardh or Obligatory Acts of Ghusl
Niyyah or intention to state : Nawaitul raf'aal hadathil akbar lillahi ta'aala."
I intend to cleanse myself of the hadath akbar for Allah.
To get rid of the impurities from the body.
Water must flow over the whole body.
The Sunnah or Commendable Acts of Ghusl
Performing the wuduk before commencing the ghusl.
To say "Bismillaahir-Rahmaanir-Rahiim".
Scrub the body.
To run the fingers between the fingers, toes and hair.
To observe the muwaalaah - that is to perform the acts one after another without stopping in between the acts.
To clean the right sides before the left.
To perform the washing of each part three times.